The 10 Best Sleeping Bag Liners for Pure Comfort [2024]

Extend the life of your sleeping bag and add an extra layer of comfort with the best sleeping bag liner of 2024. Find out which is the best liner for your sleeping bag in our comprehensive buyer’s guide.

After spending over ten years on the road living out of our backpacks we’ve found that having a great sleeping bag liner is one of our absolute hiking essentials.

But with lots of choices on the market today, we want to give you peace of mind in knowing that we’ve researched and sampled a variety of sleeping bag liners and narrowed your search down to the top 10 best sleeping bag liner options for 2023.

We know that after you read this post, you’ll find a great sleeping bag liner that meets every expectation!

Sea To Summit Thermolite Reactor

Our Pick – Sea to Summit Thermolite Reactor



Great for Summer Use

Other Great Options…








$60 - $80

Thermolite Fiber Polyester

14 oz


84 x 36 in

$50 - $75

COOLMAX Polyester

8.7 oz


84 x 36 in

$70 - $90

Thermolite Fiber Polyester

13.5 oz


86 x 31 in

$20 - $35


9.6 oz


82 x 32 in

$250 - $300

Ultra-dry Down

9.2 oz


84 x 36 in

$35 - $50

COOLMAX Polyester

9 oz


86 x 32 in

$75 - $100


3.6 oz

Mummy & Rectangular

74 x 30 in & 78 x 32 in

$50 - $75


5.5 oz


82 x 36 in

$75 - $100

Polartec Recycled Microfleece

20 oz


82 x 30 in

$25 - $40


12 & 24 oz

Rectangular & Double

87 x 36 in & 91 x 58 in

The Best Sleeping Bag Liner – Our Expert Guide

Choosing the best sleeping bag liner is a subjective task. We aim to provide not just quality, but shapes, weights, and materials that suit a range of tastes and budgets.

But for 2022, there is a clear standout.

NOMADasaurus Pick: Sea to Summit Thermolite Reactor

Sea To Summit Thermolite Reactor
  • Price Range: $60 – $80
  • Material: Thermolite Fiber Polyester
  • Weight: 14 oz
  • Shape: Mummy
  • Dimensions: 84 x 36 in

The Sea to Summit Reactor ticks off all the boxes. Not only is it reasonable on the wallet but its Thermolite hollow core fiber insulation provides an extra 14f of warmth.

That’s one of the best weight-to-warmth ratios you’ll find in any liner.

The Thermolite Reactor has several features that make it more functional, such as the pull cord that keeps the cold air out.

In addition, the foot box provides ample space to let the little piggies spread out.

The soft material is comfortable and, importantly, packs down better than most fleece liners while providing only 8.7 ounces of additional weight to deal with.


  • Elite warmth-weight ratio
  • Comfortable and plush
  • Can be used for summer camping


  • Packed size larger than other liners

Sea to Summit Coolmax Adaptor

Sea To Summit Coolmax Adaptor
  • Price Range: $50 – $75
  • Material: COOLMAX Polyester
  • Weight: 8.7 oz
  • Shape: Mummy
  • Dimensions: 84 x 36 in

If you struggle to get out of bed in the morning, then the Sea to Summit Coolmax Adaptor is only going to make it that much harder.

Without adding a lot of weight, this liner provides a wonderful all-around inclusion to your hiking gear list.

The Coolmax fabric is perfect for those warmer, sticky nights. Its moisture-wicking ability will keep you comfortable and relatively sweat-free until the sun rises again.

Not only is it soft, but the 3D foot box and stretchiness of the fabric mean it works for all sorts of hikers, especially restless sleepers. All this for a non-silk sleeping bag liner.


  • Spacious
  • Good summer and winter option
  • Great moisture wicking


  • Slightly larger pack size than silk options

Nemo Tracer Blaze

Nemo Tracer Blaze
  • Price Range: $70 – $90
  • Material: Thermolite Fiber Polyester
  • Weight: 13.5 oz
  • Shape: Semi-rectangular
  • Dimensions: 86 x 31 in

Using Nemo’s Thermolite EcoMade fabric, the Nemo Tracer Blaze is our top choice for sustainable sleeping bag liners.

The hollow core fibers provide a solid warmth-to-weight ratio, although it’s an assumed five to 10f increase.

Meanwhile, the addition of the antimicrobial finish prevents your smelly past adventures from lingering into the future.

The Tracer has a unique design, providing users with a comfy hoodie, and its semi-rectangular shape allows the liner to be used in a range of bags from mummies to rectangles.

The liner is Bluesign approved so users can feel confident that the Tracer Blaze will help their beloved sleeping bag stay in use for years to come in addition to minimizing micro-plastics draining into our oceans.


  • Sustainable and Eco-friendly
  • Durable with a lifetime warranty
  • Fits multiple bags
  • Good warmth-weight ratio


  • Synthetic materials, albeit recycled
  • The liner doesn’t show warmth increase

Alps Mountaineering Microfiber Mummy Liner

Alps Mountaineering Microfiber Mummy Liner
  • Price Range: $20 – $35
  • Material: Polyester
  • Weight: 9.6 oz
  • Shape: Mummy
  • Dimensions: 82 x 32 in

This mummy-style sleeping bag liner straddles the middle section between a hefty price tag and a budget sleeping system.

The Alps Mountaineering Microfiber bag liner is tremendously cozy while providing a thicker layer than silk and Coolmax options, without the extra price.

The thick layer will come in handy when you venture out into the cold wilderness with an extra five to 10 degrees of warmth. But hikers should be aware of the 11-ounce weight is more than most in our guide.

Thankfully, this liner packs down to a neat 6.5 x 5 inches and will sit snug at the bottom of your pack.


  • Bang for buck
  • A great intro liner


  • Narrow at the feet
  • Heavier than most

Sea to Summit Spark Ultralight Sleeping Bag Liner

Sea To Summit Spark Ultralight Sleeping Bag Liner
  • Price Range: $250 – $300
  • Material: Ultra-dry Down
  • Weight: 9.2 oz
  • Shape: Mummy
  • Dimensions: 84 x 36 in

Those reading who are looking to break out their wallets and spend some cash, then you’ll want to stop scrolling.

The Sea to Summit Spark Ultralight Sleeping Bag Liner provides as much warmth as you can hope for with your new sleep system.

The 10f of additional warmth is less than our top choice, but at almost half the weight, with ultra-dry down, you’re getting what you pay for.

The Spark Ultralight is a line of sleeping bags by Sea To Summit, with the liner providing the most basic option. It’s a great option as a stand-alone bag for those summer camping trips packing down to a diminutive 3.75 x 7 inches.

But come late fall and winter, it steps up to fit snugly into your three or four-season bag to bring extra comfort and security to your time out in nature.


  • Versatile and lightweight
  • Very warm
  • Water-resistant down


  • Expensive

Cocoon Coolmax Mummy Liner

Cocoon Coolmax Mummy Liner
  • Price Range: $35 – $50
  • Material: COOLMAX Polyester
  • Weight: 9 oz
  • Shape: Mummy
  • Dimensions: 86 x 32 in

The Cocoon Coolmax Silk Mummy Liner is one of the most comfortable lightweight liners on the market. Its thin material belies its stature to provide ample warmth on those cooler nights.

But those venturing into warmer conditions will be happy to know it does a great job of providing breathability, especially in higher humidity.

The Cocoon Coolmax is a luxury take on the liner industry offering exceptional comfort. But don’t confuse its softness for weakness. The material ensures great sleeping bag protection, from both wear and tear along with odor. In addition, the thin silk offers a surprising amount of durability.

Its only major drawback is the lack of additional extras like such as stretch fabric, that help with roominess and pillow inserts.


  • Small pack size
  • Comfortable
  • Great warmth-weight ratio


  • Not a budget-friendly option
  • No extension fabric
  • No pillow pocket
Sleeping Bag Liner
Definitely take the time to find the perfect sleeping bag liner for you.

Western Mountaineering Tioga Silk Liner

Western Mountaineering Tioga Silk Liner
  • Price Range: $75 – $100
  • Material: Silk
  • Weight: 3.6 oz
  • Shape: Mummy/Rectangular
  • Dimensions: 74 x 30 in/78 x 32 in

There’s ultralight and then there’s extreme ultralight. The Western Mountaineering Tioga Silk Liner should help satisfy those with the cravings to add both warmth and comfort to their setup without compromising weight.

And let’s be honest, these ultra lighters need a little comfort in their lives.

The Tioga Silk Liner isn’t just the lightest liner on our list, it minimizes the size of your stuff sack to 2.5 x 4.5 inches. While it only adds 5f to your sleeping bag’s comfort rating, it remains as breathable and soft as the other silk options. Add on a handy drawstring and you’ll keep out that draft that floats in under your tarp tent.

Not an ultralight? Well, the Tioga’s weight and decent warmth are a handy choice for those 7+ day journeys.


  • Featherweight liner
  • Expedition worthy
  • Varying shapes


  • More expensive
  • Decent not great warmth
  • Narrower and shorter

Sea to Summit Premium Blend Silk/Cotton Liner

Sea To Summit Premium Blend Silk/Cotton Liner
  • Price Range: $50 – $75
  • Material: Silk/Cotton
  • Weight: 5.5 oz
  • Shape: Rectangular
  • Dimensions: 82 x 36 in

It’s fair to say that Sea to Summit dominates our guide to the best sleeping bag liners. Its Sea to Summit Premium Blend has a thoroughly wide variety of uses, making it great for casual travelers, backpackers, and expedition trekkers.

The Summit Premium Silk Blend is a hostel-certified liner that not only provides a few degrees of extra warmth in that uninsulated dorm room but also a fresh set of bed sheets.

Its double stitching, a mix of silk and cotton means it was designed for the trials and tribulations of travel and hiking alike, providing you with a lengthy lifespan.

The rectangular shape provides ample room to stretch and is the perfect snuggle buddy on hotter nights.


  • Versatile
  • Durable
  • Lightweight


  • Not a backcountry liner

Big Agnes Fleece Liner

Big Agnes Fleece Liner
  • Price Range: $75 – $100
  • Material: Polartex Recycled Microfleece
  • Weight: 20 oz
  • Shape: Mummy
  • Dimensions: 82 x 30 in

We’ve talked your head off about silk, cotton, and microfibers. But how about another fleece sleeping bag liner to even things out?

Although the Big Agnes Fleece Liner is not designed for those long, arduous treks into the alpine regions, it has still earned a place on this list.

Like any good sleeping bag liner, this fleece option provides a new level of comfort, warmth, and luxury. But unlike some others, it comes at a cost and that cost is weight. At 20 ounces, it’s the heaviest liner on our list, while also having the issue of being narrow.

However, those who worry little about weight (looking at you, car campers) can easily overcome these deficiencies. The fabric is durable, keeping your sleeping bag clean for longer while pulling no punches when it comes to keeping you warm on your next road trip.


  • Warm, warm, warm
  • Plush and cozy
  • Durable with a lifetime warranty


  • Heavy & narrow

Teton Sports Sleeping Bag Liner

Teton Sports Sleeping Bag Liner
  • Price Range: $25 – $40
  • Material: Cotton/Polyester
  • Weight: 12 and 24 oz
  • Shape: Rectangular/Double
  • Dimensions: 87 x 36in/91 x 58 in

If you’re looking to cut costs or don’t feel comfortable spending a ton on your first sleeping bag liner, then the Teton Sports Sleeping Bag Liner should be on your radar.

With multiple shape and material options, you can pick what works best for you while saving plenty over the bigger brands on this list.

Users can expect to miss out on some of the comforts of the silk and more expensive liners, but you’ll still have plenty of warmth and room.

This liner adds 10f to your bag’s comfort rating. It doubles at 91 x 58 inches is as good as it gets in regards to the size. So feel free to bring along your significant other or your four-legged friend.


  • Budget-friendly
  • Dual-side openings
  • Spacious
  • Lifetime warranty


  • Not as cozy
  • Heavy

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Choosing the Best Sleeping Bag Liner

A great hiking trip includes having the right gear to be able to withstand challenging conditions, while also being able to enjoy the beauty of the trek. With your nightly shut-eye being the one chance you have to let your body heal after a strenuous hike, a quality sleep setup can only help, not hamper, your trip. 

A good sleeping bag will be at the top of your list. But there are plenty of important reasons to add on a sleeping bag liner and maybe even a high-quality sleeping pad.

A liner will not only add a layer of comfort, but it will also provide you with the ability to maintain a hygienic sleep setup, especially if you’re in the backcountry for a lengthy period of time.

Cleaning a sleeping bag is no straightforward task so plan to use a washable liner. By doing so, you’ll also increase the lifespan of your sleeping bag, which is likely to have been a significant investment in the first place.

Not only will your backcountry sleep feel cleaner and more comfortable, but you’ll also receive a welcome temperature boost, handy for those cold, bitter nights.

As you read on, you’ll discover a market of sleeping liners that is rapidly expanding as more travelers venture into the outdoors.

To keep things simple, we’ve gathered our top 10 favorites. Covering a range of budgets and materials, our guide to the best sleeping bag liners will help you have the most amazing outdoor experience yet.

Now that you have explored the best sleeping bag liners on the market, let’s dig deeper into what is right for you.

Sleeping Bags In Tent
The right sleeping bag liner can make or break a camping trip.


There is a wide range of options when it comes to bag liner material. While sleeping bags are split between down and synthetic, you’ll be faced with a veritable buffet of options.


Silk sleeping bag liners reign supreme as they cover a lot of bases that hikers love the most. A silk sleeping bag liner is lightweight and can pack down to a minimal size, perfect for those overnight jaunts into the backcountry.

After your easier trek to camp, you’ll find silk liners perform well regardless of whether it’s balmy or an icy wind has sauntered in, providing breathability and comfort.

As it covers both warm and cold climates while feeling amazing, it’s no shock that a silk sleeping bag liner comes at a higher price.


While hikers are told to stay away from the dangers of cotton trekking shirts, a cotton sleeping bag liner provides a great balance between price and performance when it comes to your needed end-of-day rest.

The price point attracts most to choose cotton liners. Those looking at this material can expect to increase their sleeping bag’s temperature rating (sometimes more than silk) while adding a layer of comfort. Cotton is also tougher than silk, so you can expect a longer life span even after repetitive use and washes.

However, the weight of cotton makes it a tougher hike to camp and it will also take up more of your bag. Overall, cotton is a great sleeping bag liner for those taking their first steps.

Synthetic Materials

Covering all bases, synthetic liners are a strong rival to silk. They are lightweight liners. They’ll pack down nice and tight while also offering fantastic moisture-wicking and breathability in warm weather.

But adventurers will have to decide whether the above qualities (and better price point) are worth the lower comfort levels and a decrease in their liners’ lifespan. After a while, this liner material has a habit of picking up your hiker stench and body oils and holding onto it even after a thorough wash.

Fleece and Merino Wool

If you’re looking to up your temperature rating significantly without worrying about weight, then fleece and merino wool sleeping bag liners are a great avenue to explore.

Both are designed to provide plenty of warmth and feel like a soft cloud against your resting body while providing plenty of breathing room if you’re on the taller end of the scale.

Merino wool and fleece sleeping bag liners are known to be durable and will feel like new after each wash for quite some time. The added weight makes it preferable for stronger hikers, or those car camping and completing shorter expeditions.


One of the biggest reasons for purchasing a sleeping bag liner is to add some warmth to your nightly sleep. Rather than purchasing another expensive sleeping bag, you can save money while extending the life of your more expensive purchase.

There are a few things to keep in mind with regard to your liner’s temperature rating. The first one, where will you be camping? We all want to feel toasty and cozy until our hiking buddy brings us to a humid and buggy location.

A warm weather liner with a higher comfort rating will be better for dealing with sticky temps and will wick away your sweat.

On the contrary, you’ll need to ensure your liner can get the job done if you’re sleeping in alpine conditions.

Remember, your liner’s temperature rating is simply the number you take off your sleeping bag’s comfort rating.


Ask anyone who has done long-distance trips, whether that be down the Appalachian Trail or through the Austrian Alps, weight matters. You can be strong and fit or like a feather in the wind – the weight of your pack will affect not just your performance, but your enjoyment.

Each item you add to your hiking bag should come under consideration and everything should hold a purpose (unless you’re car camping). Early days, your hiking kit is decided on a trial-and-error basis. Over time, you’ll have it dialed down.

But for now, try to figure out if going the lighter or heavier route is worth the temperature rating or the increase in pack weight.

Hiking Backpack
You’ll want a sleeping bag liner that is lightweight if you’re planning on trekking far.

Pack Size

Different materials pack down into different sizes, affecting what you can fit into your hiking pack. If your sleeping bag liner is a top priority, then you’ll work around this.

However, if it’s a luxury extra, you’ll need to know what size works best without affecting what else has found a home in your hiking pack.


By now you’ve seen that sleeping bag liners come in all shapes. Let’s take a further look.


By far the most popular, the mummy sleeping bag liners are designed to fit your body. This means less fabric and more heat.

This tight-fitting means can be more restrictive. However, most sleeping bags are mummy shaped, making this type of liner a popular choice.

Rectangular Shape

Rectangular liners are great for those who prefer more space over less warmth. The additional space means more open space to heat and more energy exerted to do so. This shape is preferable for warmer adventures.


Hikers with a bit of extra height should look for liners with long or tall options. These come in both rectangular and mummy liners.

Double Width

As the name suggests, double width is great for snuggling with your hiking buddy or even for those who just can’t spread out enough when they sleep.

Additional Features

While additional features won’t make or break a liner’s worth, they can help break the deadlock if you are choosing between multiple options.

These features, such as ripstop fabric, hooks, and dual-sided zips, will make your life easier out on the trail. A pillow pocket provides extra comfort, while a drawstring will help keep any wind drafts out of your bag.

Wrap Up

Well, there you have it, folks. A sleeping bag liner not only provides you with extra warmth, but it will become a friendly companion to your sleeping bag along your travels. A sleeping bag can be one of the biggest purchases you make in your outdoor adventures. Protecting it is well worth it.

You have plenty to choose from, between budget, lightweight, and luxury options. Ticking all the boxes is the Sea To Summit Summit Thermolite Reactor that offers quality without a big blow to your hip pocket. Sleep in comfort, whether it’s June or January.

NOMADasaurus Pick:

Sea to Summit Thermolite Reactor

Adventurers looking to take their travels out into the remote backcountry will quickly become best friends with their Sea to Summit Reactor.

Styled to fit the oft-preferred mummy sleeping bags, this sleeping bag liner adds up to 14f of additional warmth.

Sea To Summit Thermolite Reactor

Its 3D foot box provides extra room and more comfortable sleep. At 14 ounces, it will help minimize extra weight while providing an option as an ultralight summer sleeping bag.

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Alesha and Jarryd

Hey! We are Alesha and Jarryd, the award-winning writers and professional photographers behind this blog. We have been travelling the world together since 2008, with a passion for adventure travel and sustainable tourism. Through our stories and images we promote exciting off-the-beaten-path destinations and fascinating cultures as we go. As one of the world's leading travel journalists, our content and adventures have been featured by National Geographic, Lonely Planet, CNN, BBC, Forbes, Business Insider, Washington Post, Yahoo!, BuzzFeed, Channel 7, Channel 10, ABC, The Guardian, and plenty other publications. Follow our journey in real time on Facebook, YouTube and Instagram.

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