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Wind River Sleeping Bag: -10F Down

4.8 out of 5 stars
10 Reviews

Out of Stock

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Why We Like The Wind River Sleeping Bag

Marmot's Wind River -10 Degree Down Sleeping Bag is the mummy bag we crave when camping in cold weather. Whether we take it out in the shoulder seasons, take it up to higher altitudes, or camp through the winter, this bag is filled with 650-fill down that lofts to trap body heat close to your body. A Down Defender treatment protects the down from collapsing when exposed to moisture, and the baffles are designed to minimize gaps that can create cold spots.


  • Ultra-warm sleeping bag with versatile features for multi-season use
  • 650-fill down insulation with Down Defender for all-weather warmth
  • Dual-side zippers offer adjustable ventilation and easy entry
  • Mummy-style hood with cinchable draft collar to lock in heat
  • Internal stash pocket secures a cellphone or headlamp in reach
  • Item #MARZ9NW
[face fabric] 100% 20D nylon mini ripstop, [bottom] 100% 30D nylon, DWR coating, [lining] 100% 20D nylon taffeta
650-fill duck down, Down Defender hydrophobic coating
half-length, dual zippers
Max User Height
[regular] 6ft, [long] 6ft 6in
Shoulder Circumference
[regular] 64in, [long] 65in
Hip Circumference
[regular] 59in, [long] 60in
Foot Circumference
[regular] 48.5in, [long] 50in
Bag Length
6ft, 6ft 6in
Draft Tube
[internal] 1 stash
Pad Retainer
Fill Weight
[regular] 2lb 8.5oz, [long] 2lb 12.5oz
European Norm/ISO Comfort Rating
European Norm/ISO Lower Limit Rating
Storage Sack
not included
Stuff Sack
Stuff Size
[regular] 9 x 18in, [long] 10 x 19in
Claimed Weight
[regular] 4lb 1.5oz, [long] 4lb 7oz
winter camping, mountaineering, weekend camping
Manufacturer Warranty

Overall Rating

5 based on 10 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 0 reviews
4 Stars - 2 reviews
5 Stars - 8 reviews

What do you think about this product?


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5 out of 5 stars

June 6, 2023

You had me at dual side zips!

The wind river sleeping bag is really versatile. I love the dual side zips and roomy feeling of the bag, and ease of entering and exiting. As an added benefit the dual side zips allow for extra ventilation if the inner temperature gets too high; and when I zip the dual zips up to my chest I can comfortably sit in my sleeping bag in a down jacket and keep my hands and arms free to read, eat, etc.. When the temps get low it’s easy to close down the hoody and neck baffles to keep all my heat inside. Getting a good nights sleep when on an adventure in cold environments is absolutely critical and this bag will deliver! Enjoy.


Originally reviewed on marmot.com

4 out of 5 stars

May 18, 2023

Not the best.

[This review was collected as part of a promotion.] It's definitely a worm sleeping bag. However, it is cumbersome for backpacking and I've found that it tends to leak feathers. The fact that it only has 650 fill power means that you have to have an under quilt, or respective sleeping matt.

Not A Bot

Originally reviewed on marmot.com

5 out of 5 stars

May 17, 2023

Great great bag

[This review was collected as part of a promotion.] Bought the wind river from my local marmot dealer - owned for about two years now. Amazing quality. definitely my favorite aspect of it would be the extra plush neck and pillow area. Makes for a very cozy sleep! Would definitely recommend to anyone looking for a below freezing bag!


Originally reviewed on marmot.com

5 out of 5 stars

May 17, 2023

So Cozy!!

[This review was collected as part of a promotion.] My friends and I all use Marmot sleeping bags since we find them to be the best weight to comfy ratio. I picked up the Wind River bag this spring and recently took it on a 4 day split boarding trip where the temps got down to around 15-20 at night. This bag has tons of room inside for me to alligator roll all over the place, and it was so warm that I opened up the footbox to let a little cool air in, which kept me pretty much perfect through the night. I love the double zip quilt cover and the loftiness of this thing.


Originally reviewed on marmot.com

5 out of 5 stars

May 9, 2023


Size Bought:
5' 8"

I’m 220 and sleep hot. Used this bag the first time it was 10degrees f and I was so hot in this thing I had to open the foot vent and in zip both sides to sleep. Had a 8.2r rated sleeping pad under it and that setup was a furnace.

Matthew B
5 out of 5 stars

October 11, 2022

Fantastic sleeping bag!

[This review was collected as part of a promotion.] I ordered this for my husband and he loves it! We used it this past weekend for some car camping and it was so comfortable and warm. I am jealous of the colors of his bag vs. my 0 degree bag. They are awesome and fun! Highly recommend this bag.


Originally reviewed on marmot.com

5 out of 5 stars

August 10, 2022

It makes me feel like Mochi Ice Cream

[This review was collected as part of a promotion.] It's sooooo comfortable. It's like being the ice cream in the center of Mochi. I love it for car camping and short backpacking trips. It doesn't pack down as much as more alpine-style bags, but it's also a 10 degree, and my coldest weather bag. I love the extendable foot area and the dual zippers on the side.

Daniel K

Originally reviewed on marmot.com

4 out of 5 stars

July 30, 2022

Great bag, but wrong style for m.

[This review was collected as part of a promotion.] I did not like the design of the bag, specifically not being able to unzip one side all the way down. Also, the "neck" the bag had a curved cut which left a gap at my neck.


Originally reviewed on marmot.com

5 out of 5 stars

June 8, 2022

6 feet or taller with athletic build- buy the long

[This review was collected as part of a promotion.] Excellent construction, with a well thought out design. It is significantly warmer than my sawtooth marmot bag. I have no doubt in the temperature ratings. I’m 6-1 with very broad shoulders. I debated between the long or regular. I’m very grateful I choose the long.

Fresh Legs

Originally reviewed on marmot.com

5 out of 5 stars

March 24, 2022

If you only had one sleeping bag...

...this might be the best choice. Disclaimer, I'm a Marmot ambassador. The truth is that I'm equally vocal about what I like and don't like. I tested a prototype Wind River. It's not at the extreme top of the Marmot line, but it checks all the boxes when it comes to warmth, packability, and cost. While not the most compact for its weight and warmth, it's hard to beat on dollar to performance. This bag is backpackable with enough volume to comfortably camp for extended periods. The flap zipper and expandable foot box make it lounge-worthy for tent and car camping. At 10 degrees, it will cover all but the most extreme temperature ranges. I spent one month in it with temps down to 15 degrees. It was a bit warm for that, but I could always unzip the bag. At the price, this might be the last bag you'll ever need.

Pete Takeda

Originally reviewed on marmot.com