Marmot CWM MemBrain

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Regular Long
Weight 4 lb 8 oz / 2066 g 5 lb 0 oz / 2267 g
Fill Weight 2 lb 12 oz / 1247 g 3 lb 0 oz / 1360 g
Temperature Rating -40 F / -40 C -40 F / -40 C
Fill 800 Fill-Power Down 800 Fill-Power Down
Shape Mummy Mummy
Max User Height 6 ft 0 in / 180 cm 6 ft 6 in / 200 cm
Price $699.00 USD $719.00 USD

Where to Buy

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Manufacturer's Description

Visit Marmot's CWM MemBrain page.

Retailers' Descriptions

Here's what other sites are saying:

Welcome to the outer limits, astronauts. High-quality 800+ fill goose down and Marmot MemBrain waterproof, breathable fabric form the core of this portable environment designed to deliver restful sleep, down to -40F, in the harshest alpine environments. Over-engineered with sturdy reinforced linings and countless baffles for a lifetime of dependable comfort and protection.


Whether you're in the mountains or on the moon, the Marmot CWM MemBrain sleeping bag is designed to deliver a lifetime of dependable comfort and restful sleep, even in the harshest environments.


When you need the best, whether for the Himalayas or the dead of winter in Alaska this is the one.This bag is non joke, made for the harshest environments on earth. The over-engineered CWM MemBrain with sturdy reinforced linings and countless baffles is designed to prevent cold spots and keep you warm. MemBrain(R) fabric ensures goose down remains lofty and warm during storm bound tent spells when condensation cannot be avoided. Waterproof, breathable MemBrain(R) fabric keeps moisture at bay and allows all 44 oz. of 800+ goose fill down to do its job Baffles on chest and feet sections run vertically to ensure down won't shift as you move 10'' of loft plumps up like a cloud and warms quickly Nautilus 6-baffle hood uses the same construction as their 8000m down jacket, it wraps comfortably to keep you warm Velcro(R) free down-filled 6-inch collar keeps warmth trapped in your bag 11 baffle foot box matches the natural lean of your feet Thermo-Pane foot box uses double-layer baffle construction to keep your toes warm Reinforced foot lining allows you to store gear or wear liners without compromising durability Down-filled draft tube prevents cold leaks through the zipper Ground level zipper allows the top layer of insulation to wrap fully over the body like a blanket Zipper guard keeps zippers tracking smoothly and prevents the draft tube from getting caught in the zipper Hidden draft tube pocket keeps headlamp or electronics out of the way but within easy reach Stretch Tricot Baffles increase the life of the bag, allowing it to be stuffed and unstuffed without tearing the baffle material 63/44'' Shoulder/foot girth Stuff sack and large volume storage sack included Filled and finished in Santa Rosa, CA Reg - 6'0'' Long - 6'6''

- OMCgear

Marmot CWM MemBrain -40 800 Down Sleeping BagThe Marmot CWM MemBrain -40 800 Down Sleeping Bag is for the explorer who likes to test the limits. Crafted from Marmot MemBrain, Waterproof/Breathable Fabric for excellent weather resistance and comfort. This bag has a 6-inch baffle width Velcro-free down-filled collar, integrated with the draft tube to trap warm air inside the bag, keeping you cozy. The Nautilus 6-Baffle Hood has chambers of down around the head for a much better fit, and the hood cord has been placed, in such a way, that it is very easy to access. A hidden draft tube pocket lined with down, lets you store any night-time essentials, like your watch or alarm. The Marmot CWM MemBrain -40 800 Down Sleeping Bag is a dependable, comfortable bag, that offers you superior protection against the cold and rain.

- SunnySports