Blogs

Finding a great backpacking sleeping pad is the next logical step in getting your backpacking gear all set once you’ve decided on the big 3 (tent, sleeping bag, backpack). The sleeping pad rounds out what’s known as the big 4 in backpacking – and this list makes up some of the most important gear you’ll carry, with these items typically also including the most expensive items you need to purchase and also representing the items where you can save the most weight.

In this guide, we’ll look at the best backpacking sleeping pads that you can find on the market today. Note that in this guide, we’ll list the specs for the regular size if possible (generally 72x20 inches) and list the r-value as well – the higher the value the warmer the pad.
Best Summer & Ultralight Backpacking Sleeping Pads
For those that are looking to focus on a summer season specific sleeping pad and / or are looking for an ultralight solution for warmer seasons, there are a few standout choices on the market that weigh less than a pound.
First, if you’re a backpacker just looking for set and forget type reliability and if you’re the type of sleeper that can find comfort in just about any flat place, the venerable closed cell foam sleeping pad could work, and will save some cash as well. The Therm-a-Rest Z Lite SOL (14 ounces, $60, 2.0 r-value), is a folding foam pad that makes packing easier (but as a foam pad, still bulky). This pad is a little light on the r-value, but would be sufficient for summer trips with moderate lows well above freezing.

The NEMO Switchback folding pad (15 ounces, $60, 2.0 r-value) is a competing option in this regard and worth equal consideration. For more, see our review of the NEMO Switchback. These foam pads are also great as a sit pad outside the tent and on breaks during the hiking day.
Most backpackers will want more sleeping comfort than a foam pad can offer however. For the lightest of the ultralight insulated inflatable sleeping pads, look no further than to the NEMO Tensor Elite (9 ounces, $250, 2.4 r-value). This new for 2025 pad will offer warmth for summer trips above freezing for most people and offers inflatable comfort, albeit in a mummy shape – this pad is all about saving weight. It should be noted that this pad utilizes 10 denier shell fabrics; extra care will need to be exercised.
NEMO also offers their Tensor Trail Ultralight (14 ounces, $190, 2.8 r-value) that doesn’t quite have the warmth to weight of some of their other pads that we’ll discuss later, but this pad is a bit lighter and makes this category.

The NEMO valve system allows for easy inflation, deflation, and fine-tuning of comfort level.
Exped has offered some of our favorite sleeping pads over the years, and in this category they offer their 1R and 3R pads, with both coming in either mummy or rectangular designs. The Exped Ultra 1R mummy sleeping pad (11 ounces, $120, 1.3 r-value) isn’t insulated, and with this low of an r-value this will only be suitable for the warmest of summer trips.

Ever since the Synmat series, Exped has offered value and all-around sleeping pad performance.
To me, the Exped Ultra 3R insulated pad (13 ounces, 2.9 r-value, $140) is a much more interesting pad. I’ve taken predecessors of this pad down to freezing or just a bit below, and lower than that combined with a thin ultralight foam pad (1/8" CCF foam). Again, Exped makes a rectangular 3R as well, but at a pound we are perhaps delving into the category to follow.

I've found that quilted construction in a sleeping pad (as seen above), or vertical baffles (baffles running head to toe) are the most comfortable and help to keep you on the pad. With a wide enough sleeping pad it's not a deal breaker.
However for me the leader in this category would be the Therm-a-Rest NeoAir XLite NXT (13 ounces, $210, 4.5 r-value) and this is an interesting pad because it’s also a leader in our next category as well. This pad has the ultralight weight that puts it in this category, and with the 4.5 r-value you likely won’t need to worry about warmth on summer trips. Looking for an ultralight pad for fast and light summer trips but that also packs warmth for the shoulder seasons? It’s a tall task to beat this pad for that type of use case.
Summary: Best Summer & Ultralight Backpacking Sleeping Pads
Therm-a-Rest Z Lite SOL
NEMO Switchback
NEMO Tensor Elite
NEMO Tensor Trail Ultralight
Exped Ultra 1R
Exped Ultra 3R
Therm-a-Rest NeoAir XLite NXT
Best 3-Season and All-Around Sleeping Pads
This is your all-around, bread and butter sleeping pad category. While weights may not be the most ultralight due to the needed increase of r-value for 3-season and shoulder season temperatures, recent advances in sleeping pad technology (it all started with the original Therm-a-Rest NeoAir) have allowed for some very intriguing options to hit the market. Weights here are generally around a pound or just a little more, with insulation that should be good to freezing or a bit below.

Choices in this category can be quickly narrowed down to just a few options. The best options include the NEMO Tensor All Season sleeping pad (around $220, 1lb) which is an excellent choice for 3-season use where warmth is appreciated, but it still might get chilly to below freezing at night with a possible cold snap taking things down to the 20s or below, or for cold sleepers any time of the year. With a 5.4 r-value and a rectangular sleeping shape, this pad has a warmth to weight to sleeping and packing space ratio that would have seemed impossible a decade ago. The NEMO Tensor All Season is my pick as the top overall sleeping pad currently on the market.

For those looking to save more weight, the Therm-a-Rest NeoAir XLite NXT ($210, 13 ounces in the regular mummy, 4.5 r-value) again gets the weight down to an even more ultralight level with sufficient warmth for 3-season trips, and will save some space in the tent and pack if needed. This pad is also available in a rectangular shape – the NeoAir NXT MAX, which would be my choice if going with the NeoAir in this category, for the additional comfort. While the NeoAir line comes with an inflation bag that works well, it’s unfortunately not adequate to utilize as a dry sack for gear, as can be found in the Exped Schnozzel. That said it is included, and any inflatable pad these days should come with some type of inflation bag / solution.

Inflation bag included with NEMO sleeping pads
The great thing about these two pads is that they are light enough to be very justifiable for summer trips, have the warmth needed for shoulder season use, and can even be used for winter backpacking if you add in a foam pad to your system to boost the total r-value.
New for 2026, Exped has released their Ultra 6.5R sleeping pad line (16 ounces, $200, 6.9 r-value) which takes their venerable synthetically-insulated sleeping pads and also adds in reflective foil to boost warmth. If you want to sleep warm and are looking for a lightweight, but perhaps not ultralight sleeping pad, this would be a sleeping pad line to strongly consider. While at a 6.9 r-value this line will work in the next section as well, the weight specs do put this line in the all-around category.
Summary: Best 3-Season and All-Around Sleeping Pads
NEMO Tensor All Season
Therm-a-Rest NeoAir XLite NXT
Therm-a-Rest NeoAir NXT MAX
Exped Ultra 6.5R Line
Best Winter Backpacking Sleeping Pads
If you’re looking for a dedicated winter backpacking sleeping pad however, pads from NEMO and Therm-a-Rest again rise to the top. The NEMO Tensor Extreme Conditions Ultralight Insulated sleeping pad (18 ounces, $250, 8.5 r-value) isn’t the most lightweight in length of name but offers a very impressive weight to r-value specification and comes in multiple shapes and sizes.
The NeoAir XTherm NXT sleeping pad (16 ounces, $240, 7.3 r-value in the regular mummy) from Therm-a-Rest is available in either a weight saving mummy shape (previous link) or in their XTherm MAX version in a larger, more comfortable rectangular version.

These pads are very impressive on the spec sheet and in regards to warmth to weight ratio, achieving a warmth to weight to bulk combo that would have seemed impossible to achieve a couple decades ago. However, I prefer to use my all-around 3-season type sleeping pads combined with foam pads (Therm-a-Rest RidgeRest, etc.) for winter backpacking. The r-values add up, and the foam pad offers some redundancy in extremely cold conditions.
As mentioned in the previous section, another pad to look at will be the Exped Ultra 6.5R line. At a 6.9 r-value this line could be used in winter conditions but at 16 ounces for the standard size would work for your 3-season trips, as well.
Summary: Best Winter Backpacking Sleeping Pads
Tensor Extreme Conditions UL Insulated
NeoAir XTherm NXT
XTherm MAX
Add-on Closed Cell Foam Pads
Exped Ultra 6.5R
Best Women’s Backpacking Sleeping Pads
Any sleeping pad in this article can be used by either men or women. There are few women’s specific sleeping pads on the market. These are typically temperature rated such that they will be warmer per a given temperature rating.
Additionally they may be shaped differently (if mummy-shaped) – generally wider in the hips, etc. for a better fit when sleeping and / or offered in shorter versions. Note that you can always use a rectangular sleeping pad for maximum room all around and / or choose a warmer pad and in various widths / lengths.
Regardless for women’s sleeping pads – a market in constant flux – the Sea to Summit Women’s Ether Light XT Insulated (18 ounces, ~$200, 3.5 r-value) offers a plush 4” of height in a women’s specific shape, and would be suitable for most 3-season, typical conditions for an average sleeper (a thin foam pad could be added for a warmth boost).
You might also be able to find a Therm-a-Rest ProLite Plus Women’s (23 ounces, under $100 on closeout, 3.9 r-value) – note that the specs are often not listed correctly online – this is an old-school self-inflating foam mattress that offers just 1.5” of height but offers some intrigue. While this is getting a bit heavy, 30 years ago this would have been one of the most comfortable options you could get.
You can find a list of women’s backpacking sleeping pads here at REI Co-op.
Summary: Best Women’s Backpacking Sleeping Pads
Women’s Ether Light XT Insulated
Therm-a-Rest ProLite Plus Women’s

Choosing the best backpacking sleeping pad is a series of compromises – it must be comfortable enough and warm enough, but pack small enough and be light enough. This results in a compromise, but in recent years these compromises have been lessened.
Most Comfortable Backpacking Sleeping Pads & Best Wide / Long Options
When comfort is the most important consideration (although keep in mind no matter how cushy, you won’t be comfortable if you’re cold), the Therma-a-Rest NeoLoft sleeping pad ($250) will be hard to beat. This larger air mattress has nearly 5” of height, but is still reasonably backpackable at 25 ounces. With a 4.7 r-value this pad should still keep you warm in 3-season type conditions. If you’re backpacking in, but will then be setting up a basecamp for a few days, this pad might be up your alley.
For me however, I don’t quite need to go up to NeoLoft level to find comfort on the trail and thus can save a bit of weight. I like to look for a pad long enough so my feet don’t hang off the end, and wide enough that as a toss and turn side-sleeper I don’t have to worry about falling off the side. The previously mentioned NEMO Tensor All Season sleeping pad – but in the long wide version, or the NeoAir XLite NXT MAX (in the large) are leading backpacking sleeping pad comfort contenders here. 25” wide pads are appreciated in this regard, along with a pad that is slightly longer than your height combined with a good backpacking pillow.

A good backpacking pillow setup, combined with the right size sleeping pad (NEMO Tensor series shown) will go a long way towards a comfortable night on the trail.
Note that any inflatable sleeping pad will be made warmer and more comfortable if you add a closed cell foam pad underneath. If you’re only using an air pad, you’ll usually want to inflate fairly firmly for more warmth, but if using a foam pad under it you can deflate the pad to a softer firmness while still having sufficient warmth in typical conditions. And, if you toss and turn at night – instead of bottoming out the pad on hard ground, even a thin foam pad will add a surprising amount of cushion for your hips.
It should also be noted that while a very niche item, if you’re looking for a 2 person backpacking sleeping pad the Exped Ultra 3R Duo (29-41 ounces, $250, 2.9 r-value) is an intriguing choice with separate inflation chambers for each person and in Exped fashion, is a compelling choice across the board.
Summary: Most Comfortable Backpacking Sleeping Pads
Therma-a-Rest NeoLoft
NEMO Tensor All Season (in larger sizes)
NeoAir XLite NXT MAX (size large)
Add-on Closed Cell Foam Pads
Exped Ultra 3R Duo (for two)
Best Budget Backpacking Sleeping Pads
If the latest greatest technology and spreadsheet leaders aren’t your thing, more budget-oriented sleeping pads in the $150 or less range are without a doubt quite workable. A venerable choice has been the Exped line – this line has a great valve system, vertical baffles that I find help keep you on the pad, and larger outer baffles to keep you centered. The Exped Ultra 3R insulated sleeping pad (16 ounces, $140, 2.9 r-value) is my choice in this category. This pad is warm enough for 3-season backpacking, can be used as part of a system with additional foam pads in winter, and won’t break the bank. The Ultra line from Exped and their predecessor from Exped (Synmat series) have been part of my backpacking gear repertoire for years, as they offer a nice blend of warmth, weight, comfort, ease of use, and price.

If price however is of paramount importance, look to the Therm-a-Rest RidgeRest, the Therm-a-Rest Z Lite SOL, or the NEMO Switchback. These foam pads will not be the most comfortable, and depending on the sleeper may only be barely better than nothing in the comfort department, but they do add 3-season warmth and will get the job done for around $60 or less. That said, for deals on usually more expensive inflatable pads from time to time, it’s worth checking at the REI Co-op Outlet.
Summary: Best Budget Backpacking Sleeping Pads
Exped Ultra 3R
Therm-a-Rest RidgeRest
Therm-a-Rest Z Lite SOL
NEMO Switchback
REI Co-op Outlet Sleeping Pads
In Conclusion
Finding the right sleeping pad is important on the trail, both for warmth and for comfort. To some extent this all goes hand in hand – while comfort is more than just warmth, you can’t be comfortable no matter how cushy the sleeping pad if you’re cold. When I look for a sleeping pad I look for the lightest weight sleeping pad that will keep me comfortable and warm on backpacking trips, and one that is also sufficiently durable while meeting the budget while also being easy to use.
You can find a complete selection of backpacking sleeping pads mentioned in this article along with additional choices here at REI Co-op. For more on sleeping pads take a look at our article: Choosing the Best Backpacking Sleeping Pad. For more on the “Big 3” of backpacking gear, see our articles: Best Backpacking Tents by Application and Budget and Best Backpacking Sleeping Bags, as well as our Best Backpacking Backpacks Guide.

A spur of the moment side trip landed us in the Guadalupe Mountains National Park with easy access to the tallest point in Texas. Guadalupe Peak looms over the surrounding desert flatlands at a respectable 8,751 feet, accessible only after paying the price of a grueling 8.4 mile round-trip, 3000-foot elevation gain trail. This is truly a spectacular not-to-be-missed hike that comes with bragging rights for ascending the highest peak in Texas.

Located in Guadalupe Mountains National Park, Guadalupe Peak offers a challenging hike with expansive, rewarding views.
Hiking to the Summit of Guadalupe Peak
There is nothing predictable about this trail; we hiked it in early April during unseasonably cool weather and were surprised with a wide range of weather conditions. Our hike started out sunny, with warm temperatures and calm winds that changed to light wind, cooler temperatures and even a few snow flurries as we ascended toward the peak. That being the said, it’s not unusual to start out in sweltering heat and arrive at the top needing some serious cold weather gear.
We were lucky to have a break in the wind and clouds when we arrived at the top that allowed us to take time to enjoy the view of Texas and southern New Mexico to the north. This is a shoulder season hike, best hiked during the cooler months of the year. Peak seasons in the park are March through May and September through December when average high temperatures are less than 80 degrees.

The trail is well maintained and a reasonable (but constant) grade. The steepest portion is in the first couple of miles. A few sheer drop offs are not for the faint of heart. However, the trail is wide with passing room along virtually the entire trail and the cliff side paths make for impressive photos. Many families make this hike with children. Sturdy hiking shoes or boots will make the mostly rock tread easier on your feet but are not required. We opted to use trekking poles, but most hikers went up fine without them (we like to use trekking poles so we can take in the scenery with less risk of stumbling).

As you make your way up from the trailhead at roughly 5750’ to 8751’ elevation at the top you’ll notice the stark changes in your surroundings from the high desert to high elevation pinyon tree forests. The progression offers a fascinating lesson on the adaptability of flora and fauna to these unique ecosystems. We didn’t see too much in the way of wildlife on the hike, except for a few lizards on the rocks and vultures and hawks flying overhead. An earlier start would likely provide a better chance to see some of the local animals (gray fox, skunks, porcupine, mule deer, snakes, etc.).

Those that make the trek are rewarded with a 360-degree view for miles on end with mountain peaks rising from the surrounding Chihuahuan Desert. Guadalupe Mountains National Park is home to eight of the highest peaks in Texas including the impressive sheer limestone bluff, El Capitan, not to be confused with the similarly named and equally impressive rock formation in Yosemite National Park.
There is no trail to the top of El Capitan, but the best view in the park is from atop Guadalupe Peak. Off in the distance, and barely visible are the 2,000-acre gypsum sand dunes on the west side of the park. The monument on Guadalupe Peak is a quirky pyramid that was put on the peak before it became a National Park and commemorates the transcontinental overland and air mail carriers. If you plan your trip during the spring, you’re likely to see spectacular blooms that may even include the rare Guadalupe Mountain violet!

The hike starts out in the high desert and passes through high elevation pine forests. If you have an extra day, and don't mind carrying a backpack and extra water, you could camp overnight at the backcountry campsite one mile from the summit and enjoy star gazing before summiting the next morning and possibly catching sunrise from the peak. Guadalupe Mountains is sometimes described as the least visited national park, but it’s one not to be missed in our book.
Need to Know
Information
The National Park Service advises carrying one gallon of water per day and turning back when half your water is gone. There are no water sources on this trail.
No-fee backcountry wilderness permits are available at the visitor’s center up to one day in advance. The campground with five tent sites is one mile below the peak. All toilet paper and solid waste is required to be removed in a commercial toilet bag (Wag-Bag or the Restop 2, etc). One bag per person, per day is required for backpackers and you may be asked to show proof you have the required bags before obtaining your permit.
Guadalupe Mountains is in the Mountain time zone although your smart phones and other devices may try to convince you otherwise since the nearest towers transmit from the Central time zone. The sparsely populated area makes Guadalupe an ideal location for dark sky viewing. There is a fee to enter the park, however the wilderness permit is free.
Getting There
Guadalupe Mountains National Park is located in west Texas about 2 hours east of El Paso. The trailhead parking lot holds only a few cars and fills up quickly even on weekdays. There is additional parking at the visitor center and the well maintained trail to the trailhead adds a bonus mile to your hike. A quick stop at the Pine Springs Visitor Center is highly recommended for the latest forecast and sage advice. If you are planning an overnight excursion you must get a backcountry permit here.
Pine Springs Campground is located at the trailhead with 13 RV sites and 20 tent sites. These must be reserved in advance and the campground is often full. Chosa Primitive Camping Area, a much larger campground managed by the BLM is 29 miles to the northeast on the road to Carlsbad Caverns National Park. It is suitable for both tents and RVs. Chosa is a dispersed, dry camping free area with no facilities.
Best Time to Go
The best time to hike would be spring and fall to avoid possible extreme summer heat. Start early in the day.
Maps & Books
The park is covered in the National Geographic Trails Illustrated Guadalupe Mountains National Park map. In addition, the Delorme Texas Atlas can help with getting to and from this and other destinations in the state. In regards to guidebooks, see Hiking Carlsbad Caverns & Guadalupe Mountains National Parks as well as Best Easy Day Hikes Carlsbad Caverns and Guadalupe Mountains National Parks.

Spring comes slowly to the high country of the Rockies and other mountain ranges in the western United States. As the days get longer and temperatures rise, summer backpacking season seems tantalizingly close. But between the snow melting and the summer wildflowers blooming is a period of time colloquially referred to as "mud season". Depending on elevation and latitude, mud season might last from mid-March to late May, give or take a few weeks. With snow melting and spring rains mixed in, many trails turn to muddy messes or even small-scale streams if the drainage isn't designed properly or the water bars (structures built across the trail to divert water) aren't cleaned out.
Tips for Hiking During Mud Season
Not only is hiking in these conditions unpleasant, it can also damage the trails. Fortunately, many trails in the Southwest are in excellent condition during late spring and make great destinations. February through May is a great time to plan a trip to national parks, wilderness areas, and other public lands in Arizona, New Mexico, and Utah, for example. If you're not able to get to the Southwest, there are still ways to make the most of mud season. Giving your gear a good cleaning and condition check is always something worth making time for, but can be easier said than done on nice sunny weekends.

If travel to other regions is not on the agenda, exploring other outdoor activities, like road bicycling or running, can be great ways to get in shape for when hiking season truly arrives.
Different Trails, Different Mud Seasons
And by becoming familiar with your local trails you can gain a good intuition and understanding for which ones will be quagmires at certain times of the year and which ones might be passable. Sandy soils or trails with good drainage, or those in the rain shadow of a mountain range, are good places to target. For example, when many of the trails in the mountains are muddy other destinations at lower elevations often offer some good hiking or vice-versa. Each region has its own nuances, and figuring those out is half the fun – it’s all about knowing your region and your opportunities!

Mud season trail
Hike Early in the Day During Mud Season
Other ways to deal with mud season is to hit the trail for dayhikes as early in the morning as possible, as often times during this time of the year overnight temperatures are still in the freezing range (subsequently freezing any muddy trail solid, saving both the trail as well as your gear from mud). By hiking early, you can often get a hike in and be heading out just as things start to warm up and thaw for the day.
Mud Season Footwear
Waterproof footwear combined with hiking gaiters is also helpful at this time of the year – this will help keep not only water, but the mud out of your shoes or boots.
Editor's Note: This Jargon installment originally appeared in Issue 45 of TrailGroove Magazine. You can read the original article here.

On any hiking or backpacking trip, the ability to procure drinking water during the hike is one of the most important logistical considerations for both pre-trip planning as well as while we’re on the trail. Finding the water is of course the first step, and having the necessary gear to properly process the water so it’s suitable to drink is the second part of the equation.
Here we’ll look at the main types of water filters and backcountry water treatment methods that are best suited for backpacking and hiking, and elaborate on the necessary reading between the lines that needs to be done when choosing the best backpacking water filters or treatment options for backcountry use.

An assortment of various types of backcountry water treatment options
Backpacking & Hiking Water Treatment: What We Need to Treat & Filter
Microorganisms and Biological Concerns
While protozoan concerns such as giardia and cryptosporidium get the most publicity, concerns are best looked at in a categorical fashion. Starting with biological contaminants from smallest to largest, viruses (example: hepatitis, rotavirus, often smaller than .1 micron) are notoriously difficult to filter as they can slip through most common filter’s pore size.
Luckily, viruses are mostly a concern where there are many other people – for example where you might find untreated sewage. However, it’s always important to remember the source of the water you’re filtering. Bacteria (example: E.Coli, Salmonella, average size greater than .3 microns) are a more common concern in the wilderness as they are spread by both humans and wildlife, but luckily they are larger than viruses and more easily captured by most common filters.
Protozoa are a bit larger and include cryptosporidium and giardia, and a filter that will filter to 1 micron or smaller is recommended for removal. Concerns that are larger still include tapeworm eggs and unsightly, but not necessarily dangerous, critters of various types in your water such as insect larvae. On many occasions I’ve scooped water from crystal clear mountain streams and upon close inspection, have been quite surprised at what that scoop reveals to the eye – from sticks and stones to tadpoles and worms of various types – not to mention what you can’t see. I prefer to get my calories from my food bag while backpacking, and luckily these larger organisms are of course, very easily filtered.

Water sources will vary in purity, but various types of backcountry water treatment and filtration methods are available and can be utilized. Each method offers pros and cons, and I often prefer to use methods / technologies in combination depending on the trip.
Other Treatment Considerations
Many other components can make up the water you’re drinking in the backcountry as well. Chemicals, pesticides and herbicides, heavy metals, tannins, silt, taste and odor, as well as natural particulates of various types will need to be considered. Some of these concerns will only affect smell and taste, others could affect your health. Visible suspended matter is removed by most filters, but tannins and taste / smell can pass through – in my experience even drinking tea colored water however, has been fine.
If your water source is downstream of an area that has seen prior or active agricultural or mining use for example, chemicals and other various components introduced by man could be in the water source, especially as you move further downstream in the water supply chain. To reduce these types of contaminants and concerns we can utilize a purifier or filter that contains a carbon stage, or add a carbon element or step to an existing setup to assist in reducing many of these possible impurities.
Physical Backpacking & Hiking Water Filters / Purifiers
Most water treatment products designed for backcountry use that are reasonably lightweight, will not address all of the above concerns in one fell swoop. Thus, we need to evaluate our backpacking and hiking destinations, as well as our own personal comfort level to find the best compromise. For backpacking in the mountainous wilderness areas of the United States for example, the general consensus is that viruses are usually not of a great concern, and many times our water sources are fairly pure from man-made pollution as we’re getting it close to the source.
In these cases bacteria and protozoa are usually the main concerns. Other backcountry trips may find us filtering water on the banks of a river far from the source, that has passed through many towns before we consume it, perhaps on foreign soil, and the full gamut of contaminants are more of a possibility.
Water filters do just what they say; they filter the water to a certain micron level to remove bacteria and protozoa. Water purification by definition, including options like the First Need XLE will take this all a step further by also removing viruses, though not all products that are officially listed as purifiers will remove or reduce chemicals, heavy metals, tannins, debris, etc. – your water may be purified by marketing general standards, but it will not necessarily be “pure”.

A classic pump filter works well for pulling water out of hard to reach and shallow sources.
Popular water filters for backcountry water treatment should filter to an absolute pore size of .3 microns or smaller for adequate removal of bacteria, protozoa, and all things larger. Note the absolute part of the pore size equation, as filters listed with a “nominal” pore size will only on average filter to that level. Absolute is a guarantee, and is the number we’re actually interested in.
If you prefer viral protection, you will need an option with a much smaller absolute pore size; as a result flow rate will likely suffer and these types of purifiers are rare. Alternatively some filters combine with other technology to treat the virus part using an iodine or ion exchange process. Backpacking water purifiers that remove viruses physically are rare but can be found in the MSR Guardian pump purifier. Other options combine a normal filter with a cartridge that contains an iodinated resin for added virus protection, while the Grayl purifier uses an ion exchange process to achieve this goal.
Physical filtration can be achieved utilizing various types of elements and technologies. The most popular lightweight water filter technology today, hollow fiber filters work by passing water through a multitude of small tubes; tubes that are perforated by many, many, pores so small (rated to the micron) that anything larger than this pore size cannot pass through, trapping any living organisms or non-living matter larger than the pore size. Hollow fiber filters are popular for their light weight and versatility – you can pretty much find one in any filter configuration you prefer – be that as a gravity filter, inline filter, or pump.
Hollow Fiber Filtration
Hollow fiber filters can usually be backflushed to help restore flow rate, and flow rate will vary depending on pore size, surface area, and use. The most popular hollow fiber filters are in the .1 to .2 micron range making them sufficient for bacteria and protozoa, and this micron level is usually a good balance of protection, sufficient flow rate, and lifespan. Smaller micron, virus-rated filters also exist in this category as seen with the aforementioned MSR Guardian purifier, but flow rate will be slower due to the smaller pore size.

Gravity filters, an example shown here using hollow fiber filter technology, use the force of gravity to move water through the filter.
Hollow fiber filters cannot be allowed to freeze when wet (the MSR Guardian is an exception) or after they've been used, so on trips where it will freeze at night you’ll need to sleep with the filter in your sleeping bag or carry it in your pocket any time temperatures begin to flirt with freezing during the day – this goes for nearly all other filters using different types of elements as well.
In addition to freezing, physical filters also need to be treated with some care in regards to drops and impacts, which could damage the element. Some hollow fiber filters like the Platypus GravityWorks (read our full GravityWorks review here), and the Katadyn BeFree have manufacturer supported integrity tests which are very helpful for a little peace of mind – unlike other gear, you can’t really tell if a filter is working properly or not, without this test.
Ceramic Media
Other types of physical filter media will use a ceramic element like the MSR EX filter, and the Katadyn Pocket Filter, or utilize a glass fiber element like the venerable Katadyn Hiker Pro. Ceramic filters have the ability to be repeatedly field cleaned. Some filters are entirely self-contained and will need to be thrown away when their flow rate diminishes too much to be of practical use, while others setups will have a replaceable cartridge that fits into a housing.
In the Field with Physical Filters
No matter what filter technology you end up going with, physical filters are most often utilized in an inline, gravity, squeeze, or pump configuration. The traditional pump water filter requires you to pump the water through the filter element via a hose in the water source, and is a proven setup at both getting you water and providing an ample upper body workout.
Pump Filters
Pump filters have moving parts and increase the complication and weight, but these are also great for pulling water out of hard to reach places. The other methods will require you to fill some type of reservoir with dirty water first, by either submerging the dirty water container or bag in the water source or, if it’s one of those shallow or small sources you occasionally may need to use a separate vessel to fill the dirty container, like a mug (boil later to sterilize).

An inline water filter connected to a hydration setup treats water as you drink.
Gravity Filters
Gravity setups like the Platypus GravityWorks and the Katadyn Gravity BeFree let gravity do the work for you, by filling a dirty reservoir with water and by elevating, hanging from a tree branch or rock if possible, water passes through the filter element into a clean container. Inline setups such as the MSR Thru-Link splice into the tubing of your hydration reservoir and your own drinking force filters the water with each sip, while with squeeze setups like the Sawyer Squeeze, you can utilize a combination of gravity and squeezing force to move the dirty water through the filter and the filtered water into a clean vessel or drink directly.
Water Bottle & Straw Filters
Other options integrate the filter into a water bottle (LifeStraw Go Series) or softbottle (BeFree), where much in the same manner as an inline filter with a hydration reservoir, your drinking or a combination of drinking and squeezing is what filters the water as you go. Straw type options like the Lifestraw Peak (view at REI) are also another strategy, treating water by directly inserting one end into a water source and drinking from the other side of the straw. A straw filter is limited in that you cannot process larger volumes of water and each sip takes more work, and straw filters are perhaps best reserved more for emergency usage.
Prolonging Filter Life
In whatever case, seek out the cleanest water possible to prolong the life of your filter and for the best flow rate. While many filters can be backflushed or cleaned, this is usually a losing battle over time. Although filters are rated by the gallon or liter in regards to their lifespan, and while it’s a great idea to evaluate this when choosing a filter, take this number with a grain of salt. Clean water is important for other treatment methods as well; in very turbid situations it’s a good idea to allow water to settle in a separate container (in for example, a Sea to Summit Bucket), then treat from the top. Luckily, this is more of the exception than the norm for most of us.
Backcountry UV Water Treatment
Ultraviolet treatment options like those offered by Steripen, come in various forms using either normal or rechargeable batteries, and utilize, as with many municipalities, UV light from a special lamp that’s inserted into your water container to neutralize many microorganisms by disrupting their DNA. This process usually takes about a minute and you’ll most likely be treating a liter of water or so at a time. Some other UV bottles have come (and gone) to / from the market that feature an integrated lamp, and yet others have been designed to float from the surface of your water vessel.

UV water treatment uses battery powered ultraviolet light that's inserted in a container to treat many microorganisms.
On the plus side, these UV treatment options are quite effective at neutralizing the things that physical filters have the toughest time with – viruses – and the technology is proven. However, many are not comfortable relying on an electronic and potentially fragile instrument for their main or only wilderness water treatment source.
Additionally, UV light on its own is not sufficient for neutralizing all living organisms that could be present in your water – tapeworm eggs for example, or larger organisms and larvae that may or may not do any harm but may not necessarily be what you want to ingest, nor will a UV product remove anything from the water or improve its composition. If the water is dirty, you’ll be drinking dirty water.
Steripen offers a filter with a 40x40 micron mesh screen that can help here, which is intended to reduce organic matter or particulates. Performance may also be insufficient in murky water, requiring pre-filtration. All said, this is an excellent technology as long as you’re aware of the limitations; I utilize a Steripen Adventurer Opti as a secondary treatment with a hollow fiber filter on any trip where I desire viral treatment.
Chemical Water Treatment
Chemical treatment usually utilizing chlorine dioxide (Aquamira) or Iodine (Potable Aqua) and on occasion some other chemicals like household bleach or other chemicals that produce chlorine, like Aquatabs can be effective, but like anything this category has its share of pros and cons. In contrast to physical filters and like UV treatment, chemicals are again effective against viruses, but often take longer (hours) to work on such concerns as cryptosporidium (4 hours) and these products will add a taste to your water; other products are not suitable for cryptosporidium whatsoever. Advocates for chemical treatments praise the ease of just adding the treatment right into their water bottles and allowing the treatment to take place as they hike.
To be honest, most of my thought goes into making sure my drinking water source is either free of any chemicals or how to reduce or remove them should there be any chance of them being present, so chemical treatment is a bit counter-productive from my point of view, and options like iodine are not an option for pregnant women or those with any type of a thyroid issue. Iodine and chlorine (i.e. bleach) on their own, are not effective against cryptosporidium.
However, this method is lightweight and over the years has been popular with ultralight backpackers, though decreasing in recent years with the increased availability of very light hollow fiber filters like the Sawyer Mini. In this category, other devices have seen the market over the years that create a solution with salt to create an oxidant solution that you subsequently dissolve in water; but as with other chemical treatments, with a 4 hour wait time these are not the quickest of options.
An example can be found in the discontinued MSR MIOX. These devices seem to come and go from the market. Chemical treatment may also be integrated with some filters to move them into the purifier category. As with boiling, chemical treatment can be a good backup to bring as well or to utilize in conjunction with other methods.

Hundreds of miles from the source, I took extra steps in my treatment process at this backcountry location.
Boiling
Boiling water is an excellent way to neutralize microorganisms that might be present, but it takes a while, requires a lot of fuel, and let’s be honest, on a hot summer day, who wants to drink steaming hot water when we could be drinking that crisp and cold water from a mountain stream? As such, boiling can be tough to utilize as a main water treatment method on most 3 season backpacking trips, but it’s an excellent method to keep in mind as a backup method should your filter or other method fail you.
In winter however, melting snow for water may be your best and only option. Be sure to bring a big pot (my Evernew 1.3 works well solo) and a stove that will work well during continued usage in cold conditions like the MSR WindPro II – read our WindPro II review here. Opinions on how long to boil water vary widely; the CDC suggests bringing water to a rolling boil for 1 minute, or for 3 full minutes at altitudes above 6562 feet (be sure to check that 2 on the end of your altimeter!). Data suggests however that pathogens are neutralized at lower temperatures; in the end it depends on heat and time but luckily, both are achieved by bringing your water to a boil and after removal from heat.
Carbon Filtration
As we’ve seen, the technologies used above are all mainly designed to thwart microorganisms. If improving the taste and smell of your water, or if any agricultural and / or industrial contamination is a concern, look for a system that integrates filtration technology combined with a carbon stage that will improve and / or reduce, but not necessarily eliminate, these concerns.

If desired, a carbon element can be integrated into an existing system using a modular approach to filter water further.
This will increase the weight of your system, and possibly the cost of replacement elements, etc., but there is of course no free lunch. The Grayl UltraPress and Katadyn Hiker Pro are all examples of filters with integrated carbon filtration – or if you’re like me and have settled on a treatment method that does not address this concern, but you may occasionally head out on a trip where some of these concerns would be nice to cover, you can always splice in an add-on carbon element (I use an add on GravityWorks Carbon Element) for this purpose when needed.
My Approach to Backcountry Water Treatment
For a complicated issue, there are unfortunately no one size fits all solutions and in the end, when we’re concerned about not carrying extra weight, it all comes down to a compromise and what each one of us is most interested in removing from our water. Luckily there are many lightweight and effective options out there to choose from. For general backpacking we should expect to find an option that will treat what we’re concerned with for around a pound or less. About half a pound is usually doable, and lighter options of just a few ounces are very realistic to target. The best backpacking water filter or water treatment method very much depends on the task at hand.

Most of my trips are very well served by standard hollow fiber filtration technology; as with all of us most likely, my preference is to backpack into areas where the water is already fairly good. As such I’m not usually concerned about viruses or pollution, (both a Steripen and carbon filter have a spot in the gear room for such destinations to use in conjunction with a hollow fiber filter), and I like to target the removal of bacteria, protozoa, and the removal of larger critters no matter their parasitical intent or lack thereof.
The hollow fiber filter also has that added benefit of giving your water a good scrub; removing particulate matter. I really like a filter that has a manufacturer supported integrity test as well, so it essentially comes down to the cartridge for me. The Platypus GravityWorks cartridge fits all of the above criteria, and it just so happens the whole setup it comes with works well and is pretty darn convenient to use both on the trail as well as in camp.
For a complete list of backcountry-ready, tried and tested backpacking water filters and treatment methods that you can sort and filter by all the main points we’ve discussed in this post, check out this page at REI.

Every backpacker should have a slightly miserable trek just once in their life. Nothing extreme – just one with a bit of good-old fashioned discomfort. Maybe a rock under a sleeping bag, or a slightly damp boot during a section of a hike – it’s during those moments of less than easy explorations that the true value of the little amenities becomes evident, and much more appreciated. The small bits taken for granted on daily basis are sincerely cherished on the trail. That being said, there is no reason that trekking should equate to trudging. Just as a few discomforts can change perspective; it rings equally true of comforts on the trail.

A few extra lightweight luxuries can make an incredible and positive difference in your backpacking experience! While not essential, these optional extras are easy ways to pack a bit of added comfort into the backcountry.
Camp Shoes
Hiking boots and trail runners are great for their purpose, but sometimes not the best bet for comfort at the end of the day. Any hiker who has experienced the blissful feeling of removing a well-used boot knows the almost unintentional groan of satisfaction that accompanies the action. While it’s perfectly reasonable and effective to rely solely on the shoes you hike in, bringing a light weight set of slippers or sandals to wear around camp provides freedom for your feet. Crocs are a light, durable option, but any kind of easy to slip in to model works – even foam sandals from the drug store work great. Zpacks offers an ultralight camp shoe option, and the foam Croc option has been a traditional standard. Strapped on to the outside of a pack, they are a light and easy addition. They’re particularly appreciated if your hiking footwear gets wet during a hike.
A High Temperature Water Bottle
Everyone has their favorite bottle, and the market abounds with options. While the main purpose may be to hold water for drinking, a durable, well-shaped bottle can be an added element to comfort as well. One of the best things about a bottle tolerant of high temperatures is its ability to hold boiling water. On colder nights, and with enough fuel to spare, fill one with boiled water, crawl into your sleeping bag, and snuggle up with your bottle buddy – no more fro-toes (frozen toes). Insulated by your bag, a dependable bottle will stay hot for hours.

An added bonus – in the morning, you have pre-boiled and warmer ready to drink water! The Nalgene water bottle has long been a forerunner in the bottle race and even with admirable competition, and its size and functionality are proven components to its success. If the wide mouth seems bothersome, ones with smaller mouths are available, as well as attachable guards which funnel the water to a smaller opening. If that's not enough, you can even pick one in your favorite color.
A Salty-Sweet Treat
Of course there’s the classic GORP, but if you’ve ever coveted a 5-dollar candy bar, take this as your excuse to splurge on your lust. Go for that one that contains maple encrusted bacon, or caramelized pecans, or elven magic – whatever ingredients really make you salivate. On a recent trek, a hiker brought a salted toffee dark chocolate bar and for nearly two hours – and then sporadically throughout the rest of the trip – we found ways to discuss its epicness. Whether it comes in the form of chocolate or some other kind of special treat, the salty-sweet combination is oh so appreciated, and oh so much more delicious after a 6 hour hike.
A Backcountry Café
Coffee in the morning hours just makes everyone friendlier. Melitta or similar cone-shaped coffee makers are lightweight and simple to use. Pack one up with a pre-measured ration of ground coffee, and as many filters as needed. If space is an issue, there are traveling editions made of soft, flexible plastic for more compact traveling.

If coffee’s not your thing, hot chocolate or tea bags are light and welcome warmers. Bring along some dried creamer and a bit of sugar, and you could practically label your camp an experimental micro-café.
A Pen and Paper / A Notebook
There are always practical uses to bringing paper on the trail, but in this particular pull for its inclusion, the entertainment value is the tout: Games, writing, and drawing to name a just few possibilities. Do you sketch for fun? No? Well, with a few hours lounging at camp, now’s the time. It’s fun!

Same with poetry, writing or a poorly played hangman. You never know, though, maybe those jotted sentences or thoughts will be the first lines to your great literary masterpiece.
Spices
Ah spices. If hard pressed, spices might rank as the most appreciated extra when backpacking or camping. While the main priority of food is to provide the necessary energy and balance of nutrients, having it taste good is a highly valued bonus! Spices are the easiest way to pump up the flavor profiles – salt alone makes a huge difference.

The possibilities here are endless: cinnamon, pepper, pesto powder, ground ginger, and so many more. Being so light, having variety doesn’t mean weighing you down. Just be sure to label that sugar clearly from that salt. Even in the surrounded by beautiful wilderness, that accidental switcheroo is no fun. Find more on packing backpacking spices here.
A Riddle
This one could be a freebie! Playing cards and similar packable outdoor games are great for the campsite, but while hiking, riddles can be fun forms of entertainment when the trek feels a bit more like a trudge. Though every hiker wishes they could say they hike in constant awe of nature, but there are always those more monotonous stretches, after other conversation has been exhausted, when you simply want to take your mind off your tired feet. Having a go-to riddle is an easy way to provide some distraction, and packing up a few for longer treks can continue to fuel the fun factor. And obviously, the only added weight is your brain mass. Don’t leave it behind.
A Change of Clothes in the Car
Returning to the parked car after a decently long backpacking trip, to realize you have a nice clean wardrobe change in the car will never become old. Nothing fancy, but a pair of sweatpants and a fresh smelling shirt are always well-received – particularly if the ride home from the trailhead is longer than 30 minutes. It’s a secret to be shared: the value of cleanliness to a weary traveler.

Packing light can be paramount for longer treks, but even with all these additions, you won’t weigh down your pack. The delight experienced from these small comforts will feel far, far greater than the ½ pound or so you might cumulatively add. So go, frolic, explore and adventure – but no harm in bringing a bit of cozy to that backcountry.
Editor's Note: This article originally appeared in Issue 8 of TrailGroove Magazine. You can read the original article here for additional photos and content.