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MarmotCWM Sleeping Bag: -40F Down

MarmotCWM Sleeping Bag: -40F Down

$818.95 - $839.95
Select a color:Team Red/Redstone

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5 out of 5 stars
15 Reviews

Why We Like The CWM Sleeping Bag

Get some shut-eye in the death zone with a little help from the Marmot CWM Sleeping Bag. This 800-fill goose down insulated bag is built for the coldest, harshest weather on the planet, from the South Col to the South Pole. Its waterproof, breathable Pertex Shield 2L laminate prevents rogue bits of water, tent condensation, and melted snow from clumping the down and ruining our sleep (and chances of summiting tomorrow). The outer fabric itself is made from rugged 30D nylon ripstop and the lining from 30D nylon ripstop Pertex Microlight, which has a soft feel and the durability to prevent feather leaks.


  • One of Marmot's warmest sleeping bags built for mountaineering
  • Waterproof, breathable Pertex Shield 2L maximizes weather protection
  • 800-fill down insulation has a temperature rating of -40F
  • Cross-baffle construction and draft tubes prevent cold spots
  • Adjustable hood cinches tight for the coldest nights
  • Storage and stuff sacks included
  • Item #MAR00IA

Tech Specs

[membrane/laminate] Pertex Shield (2-layer), [face fabric] 30D nylon, [lining] Pertex Microlight (30D nylon)
800+-fill Power Goose down
left, right
Max User Height
[long] 78in [regular] 72in
Shoulder Circumference
[long] 65in [regular] 63in
Hip Circumference
[long] 63in [regular] 61in
Foot Circumference
[regular] 44in, [long] 46in
Bag Length
[regular] 83.5in, [long] 89in
Draft Tube
Pad Retainer
Fill Weight
[regular] 47oz, [long] 50oz
Storage Sack
Stuff Sack
Stuff Size
9.5 x 19in
Claimed Weight
[long] 5lb, [regular] 4lb 8.9oz
mountaineering, winter camping, weekend camping
Manufacturer Warranty

Overall Rating

5 based on 15 ratings

Review Summary

5 Stars - 15 reviews
4 Stars - 0 reviews
3 Stars - 0 reviews
2 Stars - 0 reviews
1 Stars - 0 reviews

Fits True To Size

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