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6 Best Sleeping Bags For Winter Camping of 2025

By Paul WalterLast update: 2024-12-15

The sounds of the winter trees are nothing more than pleasant. In contrast to summer when forests are a bustling and diverse world, winter is a way to feel the time shortening and quiet fills the air. Try winter camping if you want to refresh your spirit . We have curated a list of the best winter sleeping bags for 2021 to help you.

Here are the best sleeping bags for winter camping you can buy in 2025:

  • Best Overall: Western Mountaineering MF Sleeping Bag
  • Runner Up: Western Mountaineering Antelope MF Sleeping Bag
  • Best Budget: RAB Ascent 900 Sleeping Bag
  • Premium Choice: Western Mountaineering LZ Microfiber Sleeping Bag
  • Best Comfort: MARMOT Mummy Sleeping Bag
  • Best Lightweight: Kelty Cosmic 550 Fill Down Sleeping Bag
6 Best Sleeping Bags For Winter Camping
Best Overall
Western Mountaineering MF Sleeping Bag
    Runner Up
    Western Mountaineering Antelope MF Sleeping Bag
      Best Budget
      RAB Ascent 900 Sleeping Bag
        Premium Choice
        Western Mountaineering LZ Microfiber Sleeping Bag
          Best Comfort
          MARMOT Mummy Sleeping Bag
            Best Lightweight
            Kelty Cosmic 550 Fill Down Sleeping Bag

              Best Overall: Western Mountaineering MF Sleeping Bag

              Western Mountaineering MF Sleeping Bag
              Western Mountaineering MF Sleeping Bag
              Pros
              • Awesome comfort
              • Great warmth
              Cons
              • Expensive

              Kodiak MF is our most common cold weather bag in Western Mountaineering. WM churned out this bag silently for years to a dedicated follower of explorers. This bag has an enormous 3D drawer and a snag-free crease tubing system, much like Antelope and the Versalite. The ultra comfortable 66" cut into the shoulders and the 30 ounces, which is 850 offsets, makes the winter-camping at the lowest 48 our preferred mix between temperature, weight and comfort. Testers enjoyed sleeping on their bellies, side, or behind without missing a beat AND keeping the whole gear to be alone while being relaxed. It packages tiny as well.

              Western Mountaineering MF Sleeping Bag Specifications

              Product Dimensions

              36 x 15 x 11 inches

              Shape

              Semi Rectangular

              Closure Type

              Zipper

              Color

              Navy Blue

              Verdict

              The Kodiak is the fluff cream for curving and convenience

              Runner Up: Western Mountaineering Antelope MF Sleeping Bag

              Western Mountaineering Antelope MF Sleeping Bag
              Western Mountaineering Antelope MF Sleeping Bag
              Pros
              • Extra roomy and warm
              • Snag-free
              • Incredibly light
              Cons
              • Shallow hood
              • Weak neck baffle

              The West Mountaineering Antelope MF is a five-degree sleeping bag with a superb and strong efficiency. The downstream is the strongest 850 fill suitable material, and the cover, MicroLite XP, is sturdy and waterproof for its weight. This bag with a weight of 2 lbs 10 oz has a killer heat-to-weight and loft ratio for days. This past Best Buy Award winner is almost double what our latest winner, the Thermarest Questar0, a bag that can be fitting for years of travel with attention to detail and bombs. Prolonged baffles cause you to go down from top to bottom, keeping it a real star throughout the year (move the majority to the top for winter).

              Western Mountaineering Antelope MF Sleeping Bag Specifications

              Product Dimensions

              29 x 13 x 10 inches

              Shape

              Mummy

              Closure Type

              Zipper

              Color

              Royal Blue

              Verdict

              This luminous bag has an outstanding ratio of warmth to height

              Best Budget: RAB Ascent 900 Sleeping Bag

              RAB Ascent 900 Sleeping Bag
              RAB Ascent 900 Sleeping Bag
              Pros
              • Weather resistant
              • Comfortable
              • Affordable
              Cons
              • Heavy
              • Snag zipper

              For those who like to camp in the colder season, the Rab Ascent 900 is perfect but they don't want to spend the high cost of a lighter sac. The bag is just very trimmed with the same dimensions and taper than most bags. For back and side sleepers, it's comfortable. The high-temperature, high-performance 650 fill-power duck and excellent characteristics do not make the lightest bag very light. For a nice 360 bucks, as the times plunge into the young, you can jam into hills for some fun and do not freeze in the evening.

              RAB Ascent 900 Sleeping Bag Specifications

              Product Dimensions

              23.62 x 15.75 x 15.75 inches

              Shape

              Semi Rectangular

              Closure Type

              Zipper

              Color

              Rococo

              Verdict

              This bag is amazingly warm and affordable

              Premium Choice: Western Mountaineering LZ Microfiber Sleeping Bag

              Western Mountaineering LZ Microfiber Sleeping Bag
              Western Mountaineering LZ Microfiber Sleeping Bag
              Pros
              • Lightest bag
              • Super lofty
              • Awesome zipper
              Cons
              • Shallow hood
              • Not warm as the heavier bags

              Lynx LZ is an amazing bag with an unbelievable ratio temperature to weight. Any of the bags scored 0 were held by it. The soaring loft of this bag blown our testers away. The Versalite boasts an incredible full-length, snack-proof zipper, shallow collar and a massive draft tube like its colder cousins. In addition, the 62" shoulder width provided the testers with plenty of space when it was very cold to break down jacks. If you have weight as the main consideration and prefer to be a warm sleeper, this is your pack.

              Western Mountaineering LZ Microfiber Sleeping Bag Specifications

              Product Dimensions

              30 x 15 x 13 inches

              Shape

              Mummy

              Closure Type

              Zipper

              Color

              Navy Blue

              Verdict

              A large bag when it comes to size, particularly for ski tours or for cold weather

              Best Comfort: MARMOT Mummy Sleeping Bag

              MARMOT Mummy Sleeping Bag
              MARMOT Mummy Sleeping Bag
              Pros
              • Extremely warm
              • Impressive weather resistant fabric
              Cons
              • Snag zipper
              • Heavy

              The Marmot Col is a loft and warm, towering yellow gauntlet. Perhaps the warmest bag in the genre, the Col has a rugged, water - resistant exterior, vertical blurry features that will hold it over your core, and a wealth of features that make this a perfect pick for expeditions and long trips in stormy weather.

              This large burly bag is the waterproof bag of its kind. It is also incredibly spacious and warm and perfect for camping when the weather is bad. Size and longevity are both at a price, and the Col is one of the heavier bags.

              MARMOT Mummy Sleeping Bag Specifications

              Product Dimensions

              29 x 18 x 18 inches

              Shape

              Mummy

              Closure Type

              Reg

              Color

              Yellow Vapor

              Verdict

              This is a great bag to hunker and prepare for bad weather

              Best Lightweight: Kelty Cosmic 550 Fill Down Sleeping Bag

              Kelty Cosmic 550 Fill Down Sleeping Bag
              Kelty Cosmic 550 Fill Down Sleeping Bag
              Pros
              • Average warmth
              • Inexpensive
              Cons
              • Large packed size
              • Heavy
              • Low weather resistant

              The Kelty Cosmic Down 0 is one of our most heavy, weather-resistant bags but it is also the least costly pack, and the rivalry between bags that we have chosen to check is intense. The Cosmic Down also offers excellent features, including a draft collar and an extensive drawer to protect you from winter storms, despite its low price. Although we haven't tried the most comfortable pack, the space for side sleepers remains large. This is an excellent alternative if you choose to go camping in a cold weather car or for brief overnight stays without breaking.

              Kelty Cosmic 550 Fill Down Sleeping Bag Specifications

              Product Dimensions

              29 x 18 x 18 inches

              Shape

              Mummy

              Closure Type

              Zipper

              Color

              Red Ochre

              Verdict

              This prize winner is warm with meaning and is on the heavier bag and not suitable for short and quick travel trips

              How To Choose The Best Sleeping Bag For Winter Camping?

              Temperature Rate

              Both bags have temperatures that show the lowest temperature to handle for the package. But a grain of salt should be given a temperature value, since a common universal way of calculating ratings is currently not available. This ensures that producers will make their own warmth statements. These arguments are mostly practical, although in some situations they are ambitious.

              Upper limit : The average human will sleep peacefully at the optimum ambient temperature.

              Comfort : the minimum air temperature, which can easily sleep the average woman.

              Limit : The lowest air time the average man could easily sleep at is the lowest ceiling.

              Insulation Type

              Down

              The lightest isolation that you will receive is Down. It is also the most compressible, and keeps its loft (and thus insulating power) longer than synthetics (a large plus for backpacks carrying large loads). Down is usually more costly than synthetic, but it also relies on the filling capacity and is a means of assessing down efficiency. The capacity rates vary from 600 to 900 approximately.

              Synthetic

              There are several different forms of plastic insulation but in general it is not water absorbent for a smooth polyester material, making it an intelligent alternative for any camper that is exposed to wet conditions. Even though synthetic bags are generally bigger and heavier, they are much cheaper.

              Shell Fabric

              A water resistant bag must be shelled into water resistant/respiratory fabric (like rain jacket). You'd quickly be asleep in a tub of your own saliva if the fabric doesn't breathe, while you'd keep rain away. Water resistant bags must also be seam-taped to prevent water from migrating in through the gaps of the stitch.

              Bag Shapes

              Mummy

              Tapered across legs and feet, the thermal effectiveness of mummy bags is maximal. The primary task of a bag is to keep the heat that your body produces and the bag is more effective because the inside room is lower. While most mummies spend much time on the shoulders and the torso, anxious sleepers and widespread campers in an alternate cut can be more relaxed. Another advantage of mum bags is that they are light and simpler to pack so they use less bulk and insulation.

              Rectangular

              Rectangular bags with no taper along the legs are not as heat-efficient and well fit for outdoor campouts and sleep sheds.

              Semi-Rectangular

              Semi-rectangle bags are a good balance between mummy and rectangular forms, for campers who do not meet the confining requirements of a mummy bag but who prefer greater warmth to of a rectangular bag. They are heavier than mummies, but offer you a little more space.

              Which Brands Make The Best Sleeping Bag For Winter Camping?

              Western Mountaineering

              Two mountaineers in northern California joined a vision of undeveloped greatness more than 50 years ago. Their motivated commitment and determination laid the foundations on which we stand today and which realize the vision. A committed quest for the best raw materials, a careful design and unmatched workmanship have worked together to supply you with the highest-quality dorm bags. Western Mountaineering will deliver more than 30 multiple variations for any gathering, outing or adventure that requires the lightest and warmest packs.

              RAB Ascent

              Rab is a British climbing clothing and mountaineering equipment company.

              Founded in Sheffield, South York, South Yorkshire, in 1981 and purchased by Equip Outdoor Technologies in 2007, the firm currently has its headquarters in Somercotes, Derbyshire. Rab was originally mainly focused on isolation items, particularly jackets, sleeping bags and wear for expeditions. Now they're making plastic jacks, lightweight coats, excessive jackets, gloves, T-shirts and layers.

              MARMOT

              Marmot is an outdoor entertainment organization , created in 1974 as a "Marmot Mountain Works" .The business was founded in Great Junction, Colorado and shared the mutual purpose of producing its mountain equipment by local official Tom Boyce and two Universities of California, Santa Cruz Students David Huntley and Eric Reynolds.

              Conclusion

              We intend to unveil some of the secrets of choosing the right cool cold down sac to meet your needs. While a downpack can sound like a big financial expenditure, if handled appropriately for, it can keep you warm for years, and nothing replaces resting well under stars for a long night . So at least tell our testers.


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