Marmot CWM Sleeping Bag
Best extreme-cold sleeping bag for high-altitude mountaineers and winter expeditions.
This is the ultimate fortress for sub-zero expeditions, built to keep you alive when the mercury bottoms out. The waterproof shell and high-loft down create an impenetrable barrier against the elements, though its sheer bulk means it is strictly overkill for anything less than true arctic conditions.
$928.95
In stock
at
Backcountry
Who it's for
- Mountaineers tackling extreme high-altitude, sub-zero environments
- Weight-conscious climbers needing maximum warmth-to-weight efficiency
- Expeditionists requiring gear that survives harsh, multi-day abuse
Who should skip it
- Casual winter campers on a budget
- Backpackers with limited pack space for bulky gear
- Hikers needing a bag for moderate winter temperatures
Performance breakdown
Thermal Insulation
800-fill goose down creates an impenetrable barrier against sub-zero temperatures.
Weather Resistance
Pertex Shield fabric effectively seals out moisture and biting wind gusts.
Footbox Warmth
Wraparound baffle design eliminates cold spots in the most vulnerable area.
Entry and Exit
Center and dual-side zippers make maneuvering in bulky layers surprisingly simple.
Packability
High-loft down compresses well, though the expedition-grade shell adds some bulk.
Internal Storage
Thoughtfully placed pockets keep electronics and essentials warm and accessible.
Key Specs
Bag Temperature Celcius
-40°C
Bag Temperature Fahrenheit
-40°F
Footbox Size
46.1 in, 117 cm
Hip Girth
58.7 in, 149 cm
Includes Compression Stuff Sack
YES
Includes Storage Sack
YES
Includes Stuff Sack
NO
Insulation Material
800 Fill Power, Goose Down
Still have a question?
Ask Metto anything about the Marmot CWM Sleeping Bag before you decide.
