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CWM Membrain, long

by Marmot
CWM Membrain, long
SKU: Marmot-22570-6363-L

Designed to deliver restful sleep in the harshest alpine environments, the CWM -40° Sleeping Bag - Long takes the guesswork out of unpredictable weather during your overnight adventures.

$ 574.00
$840.00 Save 32%
+ Free ground shipping!


The waterproof and breathable Pertex® Shield fabric membrane offers protection from Mother Nature’s mood swings, while lofty 800-fill-power-down insulation keeps you warm in plunging temps. When it’s time to call it a day, give your feet a break in the 11-baffle wrap-around footbox with reinforced lining. The stretch tricot cross-baffle construction controls down shifting and eliminates cold spots. The down-filled draft tube and collar, nautilus 6-baffle hood, and zipper guards limit heat loss in the most extreme conditions.


  • Filled and Finished in Rohnert Park, California
  • Certified 800+ Fill Power Goose Down
  • Marmot MemBrain® Waterproof/Breathable Fabric
  • Marmot Cross Baffle Construction Prevents Down Shifting and Colds Spots
  • 11-Baffle and Wrap-Around Foot Box Increases Warmth
  • Reinforced Foot Box Lining
  • Nautilus 6-Baffle Hood
  • "Feely" Draw Cords
  • Down-Filled Draft Tube
  • Ground-Level Side Seams
  • Hidden Draft Tube Pocket
  • Stretch Tricot Baffles
  • Stuff and Storage Sack Included
  • Velcro®-free Down-filled Collar
  • Velcro®-free Face Muff
  • Zipper Guards

Detail Photo(s)

Tech Specs

Main Materials : Pertex Shield® 30d 100% Nylon 2 Layer R/S 2.3 oz/yd
Weight: 5lbs 0oz (2268g)
Bag Temperature F: -40° F
Bag Temperature C: -40° C
Bag Zipper position: LZ, RZ
Lining Material: Pertex Microlight® 30d 100% Nylon Ripstop 1.3oz/yd
Insulation Material: 800+ Fill Power Goose Down
Length Fits: 6' 6" (198 cm)
Girth: 65" (165 cm)
Pack volume: 1287.6ci (21.1 liters)