Skip to product information
1 of 3

Marmot

Marmot CWM -40° Sleeping Bag Long

Marmot CWM -40° Sleeping Bag Long

Quantity
Purchase thru Marmot

The Marmot CWM -40° Sleeping Bag is a down-filled expedition bag built for temperatures as low as -40°F. Its RDS-certified 800-fill-power goose down delivers warmth and loft, while the Pertex® Shield membrane blocks water and wind. Center and dual-side zippers make entry and exit easy, and internal hood and draft collar cords cinch down to hold heat in.

The long length fits sleepers up to 6'6", and the multi-baffle wraparound footbox adds warmth with a reinforced lining for durability. Two interior pockets keep small items like a phone or headlamp from freezing overnight. A compression stuff sack and a storage sack are included.

Key Features

Brand Marmot
Model Number M18232
Collection CWM
Product Type Sleeping Bag
Bag Temperature Celsius -40°C
Bag Temperature Fahrenheit -40°F
Insulation Material 800 Fill Power, Goose Down
Insulation Type Goose Down
Fill Weight 54.3 oz
Shell Fabric Pertex® Shield
Zipper Location Center Zip
Sleeping Bag Length Long: 6'6" (198 cm)
Shoulder Girth 65 in (165 cm)
Hip Girth 58.7 in (149 cm)
Footbox Size 46.1 in (117 cm)
Stuff Sack Size 22.0 x 12.2 in (56 x 31 cm)
Includes Compression Stuff Sack Yes
Includes Storage Sack Yes
Includes Stuff Sack No
Stash Pocket No
Product Weight 5 lbs 9.1 oz (2,526 g)
Country of Origin China, Vietnam, Thailand and other countries

Highlights

  • RDS-certified 800-fill-power goose down provides exceptional warmth, loft, and compactibility
  • Pertex® Shield fabric with a waterproof, windproof, and breathable membrane
  • Internal hood and draft collar cords cinch to prevent heat loss
  • Multiple internal storage pockets
  • Multi-baffle, wraparound footbox increases warmth; reinforced footbox lining adds durability
  • Long length fits sleepers up to 6'6"

Warranty

Limited Lifetime Warranty

Marmot products are warranted against defects in materials and construction for the practical lifetime of the product. This warranty does not apply to normal wear and tear, improper care, misuse, accident, neglect or the natural breakdown of materials over time. Warranty claims are evaluated to determine if the product will be repaired, replaced, or refunded.

Frequently asked questions

What is the purpose of the two interior pockets on the left side with no closures?

They can store items like a phone or a headlamp during the night to keep them from freezing, or small items you might want to access quickly, such as tissues or a water bottle.

What is the fill weight of this sleeping bag?

The fill weight is 54.3 oz.

Is the CWM -40° bag rugged enough for expedition use, such as Denali or Aconcagua?

Yes, it is recommended for expedition use.

Where is this model manufactured?

Marmot's high-end manufacturing happens in Rohnert Park, with additional manufacturing in China, Vietnam, Thailand and other countries.

View full details