• Marmot CWM -40° Sleeping Bag
  • Marmot CWM -40° Sleeping Bag
  • Marmot CWM -40° Sleeping Bag
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Marmot

Marmot CWM -40° Sleeping Bag

Marmot CWM -40° Sleeping Bag

Purchase thru Marmot

The Marmot CWM -40° Sleeping Bag is an expedition-grade down bag built for the coldest conditions, rated to -40°F and -40°C. Its 800-fill-power goose down is RDS-certified and delivers exceptional warmth, loft, and compressibility, while the Pertex® Shield shell is waterproof, windproof, and breathable to keep you dry in inclement weather.

A multi-baffle wraparound footbox and reinforced footbox lining add warmth and durability, and internal hood and draft collar cords cinch down to prevent heat loss. Center and dual-side zippers make it easy to climb in and out, multiple internal storage pockets keep gear close, and the standard length fits sleepers up to 6'0".

Key Features

Brand Marmot
Model Number M18231
Product Type Sleeping Bag
Bag Temperature Celsius -40°C
Bag Temperature Fahrenheit -40°F
Insulation Type Goose Down
Insulation Material 800 Fill Power, Goose Down
Shell Fabric Pertex® Shield
Zipper Location Center Zip
Shoulder Girth 63 in (160 cm)
Hip Girth 56.7 in (144 cm)
Footbox Size 44.1 in (112 cm)
Stuff Sack Size 22.0 x 12.2 in (56 x 31 cm)
Product Weight 5 lbs 2.7 oz (2,344 g)
Fill Weight 3 lbs 2.04 oz (1,419 g)
Includes Compression Stuff Sack Yes
Includes Storage Sack Yes
Includes Stuff Sack No
Stash Pocket Yes
Fits Sleepers Up To 6'0" (183 cm)
Warranty Limited Lifetime Warranty

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
  • Standard length fits sleepers up to 6'0"

Warranty

Limited Lifetime Warranty

All Marmot products are warranted against defects in materials and construction for the practical lifetime of the product. This warranty applies to the original owner of the product (receipt may be required) and 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 repair, replacement, or refund.

Frequently asked questions

What is the fill weight of the CWM -40° Sleeping Bag?

The fill weight is 3 lbs 2.04 oz (1,419 g) of 800-fill-power goose down.

What is the packed size of the CWM -40° Sleeping Bag?

The packed size is 25 x 12.2 in, and the included stuff sack measures 22.0 x 12.2 in (56 x 31 cm).

What does the CWM name stand for?

A cwm (pronounced coom) is a rounded glaciated valley.

What is covered by the warranty?

The bag carries a Limited Lifetime Warranty against defects in materials and construction for the practical lifetime of the product, covering the original owner.

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