Best Winter Sleeping Bags of 2025

BEST WINTER BACKPACKING SLEEPING BAG

The Western Mountaineering Kodiak MF is a four season sleeping bag that was designed for backpackers who want to brave extreme conditions in comfort. 

While there are plenty of excellent winter sleeping bags out there, the Kodiak MF is our top choice because it is seriously warm and comfortable. While other bags are equally as toasty, they have a narrower fit that makes them constricting. When it is cold out, we tend to spend more time inside our bags and appreciate the extra room. The Kodiak MF adds a few inches in the shoulders and is generously packed with down making it super lofty. The spaciousness also gives you the option to stuff in an extra quilt if you need to add some warmth. Considering how warm this bag is, it packs down incredibly well. 

If you’re just getting into backpacking the price tag might seem ridiculous but for serious backpackers who value high end gear, it’s a worthy investment. Also, like with all proper winter sleeping bags, the versatility of the Kodiak is limited. It would be way too warm for summer backpacking trips and overkill in mild Spring weather.

The Kodiak MF is also available in a 6 foot and 7 foot version.

BEST SLEEPING BAG FOR WOMEN

The Feathered Friends Egret UL 20 is a high quality three season sleeping bag that is specifically designed for female backpackers. 

What we love the most about this sleeping bag is its attention to detail and female tailored fit. There is extra fill around the chest and in the foot box, two areas where women lose more heat than men. Its 950+ fill is super fluffy and toasty, making it a great option for spring to fall camping. When it comes to quality, weight, packability and warmth, the Egret beats all the other female specific bags, which is why it’s our pick for the best women’s backpacking sleeping bag. 

The biggest drawback is the price, but for this level of comfort and quality, we believe it is worth it considering it has an excellent warmth to weight ratio. Another complaint is the sizing isn’t right for everyone. The Egret comes in two sizes: 5’3” and 5’9”, if you’re somewhere right in between, say 5’6”, you might find the 5’9” option too long. This extra space traps cold air, making the bag feel colder overall. And, the 5’3” option would be too tight to have the hood fit over your head comfortably. If this might be an issue for you, you can check out the unisex version of this bag, called the Swallow which has a 20-degree and 30-degree option. 

The Egret UL is also available in a 30-degree version.

BEST SLEEPING BAG FOR SIDE SLEEPERS

The Big Agnes Sidewinder SL20 is spacious enough to be a game changer for side sleepers but it doesn’t trap cold air as much as other wide options.

What we love the most about the Sidewinder SL20 is that it’s one of the only bags on this list that is truly built for side sleepers. The zipper and the hood face the side. The insulation and shape are all geared toward those who roll over. There is a mesh pocket for your pillow that keeps it in place. There is extra padding at the hip and feet, which are two pressure points for those who tend to flip from side-to-side several times throughout the night. There is plenty of room to curl your knees up without feeling constricted as you might in a mummy bag. 

One complaint we have with this bag is the zipper catches if you aren’t careful despite having an “anti snag zipper”. Maybe we were too rough with it but this could be annoying if you have to get up in the middle of the night. Also, people with wide feet might find the toe box a bit tight. 

The Nemo Disco 15, which is also featured on this list is a close competitor to the Big Agnes Sidewinder SL 20. The Sidewinder gains points on weight (it’s 7 ounces lighter), but it is not as roomy as the Disco. The extra inches on the shoulders and hips are nice but you also have to consider that it’s not the best design for retaining warmth.

The Big Agnes Sidewinder SL 20 also comes in a women’s version.

BEST BUDGET WINTER SLEEPING BAG

The Marmot Trestles 0 is a real find for hikers wishing to explore cold environments. With a durable SpiraFil synthetic insulation, the sleeping bag will keep you warm at temperatures as low as 1.9°F. A 3D hood will provide warmth and comfort for your head; you can also cinch it tightly around your face during freezing nights. Another great feature of the Marmot Trestles is the foot box, which ensures extra comfort and warmth where it’s most needed. 

The Trestles 0 has a full-length, two-way zipper built to prevent snagging. There is also a fold-down second zipper that provides fresh ventilation. In case you need anything during the night, there is an external stash pocket for your essentials. Additionally, the bag has two hang loops for storing or drying out the bag.

BEST DOUBLE SLEEPING BAG

The Feathered Friends Spoonbill UL is a two-person sleeping bag for couples who want to lighten their load.

What we love the most about the Spoonbill UL is it gives couples the warmth and intimacy of being in the same bag without having to give up comfort. There are two hoods and two collars that can be adjusted and a zip on each side so you don’t have to worry about bothering your partner when you get in and out. Feathered Friends trimmed unnecessary insulation from the bottom part of the bag and the floor is made of a super lightweight Dyneema fabric. All of this results in a warm, lightweight and comfortable sleeping bag. 

One of the downsides of the Spoonbill is it’s not great for couples who want to cuddle because of its two separate hoods. Another consideration is its price tag is pretty crazy, however if you consider the price of two premium sleeping bags, it might be worthwhile. It also loses major points when it comes to versatility. If one of you decides to go on a solo trip, you’ll need a different bag.

The Enlightened Equipment Enigma 20 is a minimalist ultralight quilt that is quickly becoming a favorite of long distance hikers.

What we love the most about the Enigma is its round foot box that is sewn shut. This design gives you more foot room while trapping in heat. This makes it a good option for backpackers who are transitioning from using a traditional sleeping bag to using a quilt. All of Enlightened Equipment’s quilts are hand sewn and the quality is top notch. They overfill their quilts by 30% so instead of stuffing them to the minimum amount needed to fill the bag, they pack in extra down to help with any loss in loft due to moisture or dirt. Thru hikers who plan to use this thing for weeks on end without washing it will appreciate this consideration.

Quilts do come with some drawbacks and the Enigma is no exception. Since it is just like a big blanket, it doesn’t have a hood so you’ll want to wear a beanie or down jacket on chilly nights. It also doesn’t have a back so it can be tricky to fully seal up the quilt in cold conditions. 

Enlightened Equipment is a cottage manufacturer based in Minnesota. All of their quilts are highly customizable, which is a great option for thru hikers who really want to have their gear dialed in. It can take over a month for a custom quilt to arrive but luckily, EE does have stock options for those who just want a standard option and don’t have time to wait for a custom quilt to arrive. 

The Enigma is available in 0, 10, 20, 30, 40, and 50 degree versions.