Col Sleeping Bag: -20F Down
Style & Size:
Quantity
Why We Like The Col Sleeping Bag: -20F Down
We take shelter at base camp in the -20 Degree Down Marmot Col Sleeping Bag when the low pressure freezes our summit plans. As the roaring whistle of the wind bangs against the tent all night, all we feel is the unmatched warmth of 800-fill goose down inside the Col MemBrain's waterproof, breathable Pertex Shield shell. A down-filled draft tube makes sure that our head doesn't get too cold, and a hidden pocket lets us keep a few items close at hand and out of the cold.
Details
- Marmot's 4-season sleeping bag for backcountry warmth
- 800-fill power goose down packs down small and provides insulation
- Mummy shape keeps warm air close to the body and packs down small
- Down-filled draft tube keeps cold air out on breezy nights
- Includes stuff and storage sack for easy organization
- Item #MARZ9N0
- Material
- [membrane/laminate] Pertex Shield (2-layer) [face fabric] 30D 100% nylon, [lining] Pertex Microlight (30D 100% nylon)
- Insulation
- 800-fill Power Goose down
- Shape
- mummy
- Max User Height
- [regular] 6 ft, [long] 6 ft 6 in
- Shoulder Circumference
- [regular] 64in, [long] 66in
- Hip Circumference
- [regular] 61in, [long] 63in
- Foot Circumference
- [regular] 44in, [long] 46in
- Bag Length
- [regular] 83in, [long] 89in
- Draft Tube
- yes
- Pockets
- 1 internal
- Pad Retainer
- no
- Fill Weight
- [regular] 37.5oz, [long] 41oz
- Degree
- -20F
- Storage Sack
- yes, included
- Stuff Sack
- yes, included
- Stuff Size
- 9 x 19in
- Claimed Weight
- [regular] 3lb 14.6oz, [long] 4lb 9oz
- Activity
- hiking, camping
- Manufacturer Warranty
- lifetime
Reviews
Q&A
What do you think about this product?
Overall Rating
5 based on 7 ratings
Review Summary
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Selecting an option will reload the available reviews on the pageAugust 18, 2025
Best cold weather sleeping bag! Warm & ightweight
[This review was collected as part of a promotion.] I bought this bag for winter use in the Himalayas. I was in temperatutes colder than -20. This bag was so good that I could not zip it up or I would overheat even in -20!!! Marmot is the only brand of sleeping bag that I will every spend money on. I bought 5 different brands to test for this trip and Marmot CRUSHED them all. Fory test I slept in the snow in my backyard in my boxers with NOTHING but the bag I was testing that night, not even a sleeping pad! There was NO comparison. Marmot was the only bag I was comfortable enough to sleep through the night without ever waking up! Very Warm, lightweight, extremely comfortable, great compression for packing, high loft insulation for extra comfort that will keep you super toasty warm in the coldest weather. Even melting snow under me did not seep through, it kept me dry and hot as heaven. Don't waste your money on any other brand of sleeping bag. Marmot bags are better than #1, they are in a league of their own! There is no comparison out there. Trust me I tried, sleeping raw in the Alaskan winter snow in my yard NOTHING came close to Marmot in every category! MARMOT BAGS FOR LIFE!!!
Originally reviewed on marmot.com
January 23, 2025
Brooks Range in September - Fantastic!
Used the bag for a fall hunt in the Brooks Range, Alaska - 150 mile north of the Arctic Circle. It was warm and comfortable. Night time temps were in the low teens to maybe single digits and I was always comfortable, never wanting for more. The arm holes are nice for reading.
Originally reviewed on marmot.com
December 26, 2024
A longer zipper, maybe other wise perfect
This bag is warm and comfortable. The size for me is perfect. One minor complaint. I would like it better if the main zip was a little longer towards the foot box but like I said, it’s a very small issue.
Originally reviewed on marmot.com
March 12, 2023
Coldest night yet....
[This review was collected as part of a promotion.] Used on an overnight in Feb. on Mount Washington, NH. Temp -10 F, wind 50-60 mph. Bag kept me warm. Wish I could have used arm holes, but it was too cold! This bag did the job, and can't wait to continue to put it through its paces. Got the long to keep my single-lined boots in the bag with me at night. At 5' 9", still had plenty of room.
Originally reviewed on marmot.com
December 14, 2022
comfortable sleeping bag
[This review was collected as part of a promotion.] this is. a great sleeping bag with lots of room that keeps you covey warm
Originally reviewed on marmot.com
June 23, 2022
Super warm and cozy
This is a big, warm bag. High quality and I love the double zipper for the arms.
Originally reviewed on marmot.com
May 17, 2022
My favorite bag
[This review was collected as part of a promotion.] I bought my Marnot Col -20 originally for climbing the volcanos of the PNW. On Rainier for example I was actually hot and had to vent the bag a fair amount which I considers a good thing because I could just sleep like a rock even on very cold nights. It’s extremely comfortable for sure and I find any excuse to use it. The waterproofing is quite impressive, when I first got the bag I just laid it out back and dumped nalgenes on it and sure enough that bag was bone dry. I enjoyed this bag so much I also got a 0* and will soon pick up a 20* as well. I’d say if this bag is in your budget and you’re eyeballing a -20 for all weather conditions you just can’t go wrong here.
Originally reviewed on marmot.com
Do you have a question about this product?
February 15, 2025
Is the temperature rating on the -20 bag the comfort rating or the survival rating?
Originally reviewed on marmot.com
February 4, 2025
What is the down fill on this sleeping bag? Tracking 800 fill power but what is the total grams of down fill?
Originally reviewed on marmot.com
January 17, 2025
Is the stated -20°F bag temperature for comfort or the extreme temperature?
Originally reviewed on marmot.com
April 24, 2024
I'm looking for a bag that I can use on a CE-5 under the stars where I can poke my arms out to work with equipment or take notes... can you tell me more about the two arm zippers on this bag? Are they for access to the outside or are these thermo gills?
Originally reviewed on marmot.com
January 15, 2024
Is the included compression stuff sack waterproof?
Originally reviewed on marmot.com
September 20, 2023
Hello guys, do you have the actual fill weight of this bag and the CWM ? Thanx in advance.
Originally reviewed on marmot.com
December 30, 2022
Is the down treated? Do you have a bag that has both a waterproof exterior & coated down.
Originally reviewed on marmot.com
March 31, 2022
What is the max height of the user? Will it fit expedition gear like the old col?
Originally reviewed on marmot.com
March 24, 2022
Stuff Sack Size: 20.1 x 11.0 in, 51 x 28 cm Is 51cm the height and 28cm the diameter or perimeter or ??
Originally reviewed on marmot.com
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