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Col Sleeping Bag: -20F Down

5 out of 5 stars
4 Reviews
$828.95 - $848.95

Style & Size:


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.


  • 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
[membrane/laminate] Pertex Shield (2-layer) [face fabric] 30D 100% nylon, [lining] Pertex Microlight (30D 100% nylon)
800-fill Power Goose down
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
1 internal
Pad Retainer
Fill Weight
[regular] 37.5oz, [long] 41oz
Storage Sack
yes, included
Stuff Sack
yes, included
Stuff Size
9 x 19in
Claimed Weight
[regular] 3lb 14.6oz, [long] 4lb 9oz
hiking, camping
Manufacturer Warranty

Overall Rating

5 based on 4 ratings

Review Summary

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

What do you think about this product?


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5 out of 5 stars

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

5 out of 5 stars

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

5 out of 5 stars

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

5 out of 5 stars

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