Marmot CWM Membrain -40F Sleeping Bag
Team Red / Redstone
Team Red / Redstone

Marmot CWM Membrain -40F Sleeping Bag

Marmot CWM Membrain -40F Sleeping Bag is rated 4.6 out of 5 by 7.
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4.5 Star Rating
4.5
$818.95

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Product Description Item No.   10269793

FEATURES of the Marmot CWM Membrain -40F Sleeping Bag

  • Filled and Finished in Rohnert Park, California
  • Certified 800+ Fill Power Goose Down
  • Pertex Shield 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
  • "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

- + Product Specifications
Gender: Mens
Features: Draw or Cinch Cord, Stuff Sack Included, Pillow Pocket, Draft Collar
Best Use: Hiking
Exact Temperature Rating: -40 Degrees Fahrenheit
Sleeping Bag Shape: Mummy
Fabric Details: 30D 100% Nylon
Bag Weight (Regular): 4 lbs 8.89 oz
Bag Weight (Long): 5 lbs
Fill Details: 800+ Fill Power Goose Down
Zipper Side: Left
Sleeping Bag Lining: 30D 100% Nylon Ripstop
Fill Weight (Regular): 50.19 oz
Max User Height (Regular): 6 Feet
Foot Circumference (Regular): 47 in.
Shoulder Circumference (Regular): 65 in.
Hip Circumference (Regular): 63 in.
Product Technology: Pertex Microlight, Pertex Shield
Insulation: Down
Temperature Rating: -50 - -1 Degrees Fahrenheit
Pertex Microlight

Pertex Microlight
Pertex Microlight is a durable, well-balanced fabric that excels at protecting your insulation. It is lightweight, yet abrasion resistant and will resist the elements. Your insulation will be free to trap and maintain your body warmth.

Check Out All Microlight Products >

Pertex Shield

Pertex Shield
Pertex Shield offers balanced wind and water protection and excellent durability due to a breathable microporous waterproof coating. This provides exceptional comfort and reduced condensation.

Check Out All Shield Products >

Rated 5 out of 5 by from home away from home This bag is awesome, being from fairbanks AK it hits -30 to -40 quite a bit and i have never been cold or felt any kind of discomfort sleeping in a tent in the mountains at these temps. This is by far one of the best purchases i have made for winter camping.
Date published: 2016-12-10
Rated 5 out of 5 by from Haven't reached its limits I've had this out twice down to 15 degrees and woke up hot a couple times. I regularly camp down to -10 so I'm anxious to get it a little colder. So far so good. Another positive is that it is quite roomy. I roll over a lot to my sides and my stomach and have not felt constricted once. The only negative is that it takes up a lot of space in my backpack, but there is just no way around that. I have three other Marmot sleeping bags and just love their products.
Date published: 2016-12-08
Rated 5 out of 5 by from Yeah, Baby. This bag replaced my 30+ year old Marmot Penguin, which I've had on 5 Alaska range trips, hundreds of Sierra and cascade trips, and lived in a Yurt near Truckee for a number of years using. I loved that bag, but its time was up. The new Cwm was a welcome addition to the sleeping bag fleet, and is every bit as warm as my now old beat to death penguin once was. I look forward to another 30 years of abusing this bag in cold, cold , windy places, while snoring like a lumber mill at 30 below.
Date published: 2016-10-26
Rated 2 out of 5 by from Can you stuff this bag to 9.5 x 19 I bought this bag due to great reviews and also mainly due to stuff size of 9.5 x 19. However, i received this bag recently and I tried to put it in compression sack M and can not come up with size 9.5 x 19. I tried multiple times with no success. Not sure if this bag can really be stuffed this size....
Date published: 2016-08-30
Rated 5 out of 5 by from Excellent bag First use of bag last weekend in the White Mountains of NH. It was 15 below Sunday night, completely comfortable in the bag, didn't even need to cinch the draft collar. Planning a big mountain trip to Alaska, this bag will be essential gear.
Date published: 2015-01-30
Rated 5 out of 5 by from Marmot CWM sleeping bag review I have had this sleeping bag for over a month now and have tested it in 25F air temps so far. I have been very impressed with the heat this bag generates. I was warm within 2 minutes of entering the bag.  I found myself venting the bag as it would get too hot even though I was in underwear. The MemBrain material works extremely well, I did not notice any condensation on the bag's outer surface at any time. I also like that Marmot has tiny snap closures for the neck baffle. The zipper guard could be stiffer and wider as I do find the zippers will still snag on the full length draft tubes (Western Mountaineering does this right BTW). The bag lofts quickly once out of the stuff sack. The vertical baffles seem to do a great job and the foot box works well too. I like the hanging loops for drying/storing this sleeping bag, it is a nice touch by Marmot. Definitely recommended and a steal for the price I paid. Good job Marmot. 
Date published: 2013-11-16
Rated 5 out of 5 by from I used this sleeping bag on I used this sleeping bag on Denali this year during the early climbing season. With 25 days on the mountain and frequent -30F temperatures this bag kept we warm. My tent mate commented multiple times on how comfortable my bag looked. I can verify that this bag was comfortable from not only a warmth standpoint but also the size. I was able to keep my boot liners, camera batteries, and 2 water bottles inside the bag while maintaining enough space to toss and turn throughout the night. How many other mummy bags can provide that?
Date published: 2013-08-15
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How many inches of loft?

Asked by: Conservativeoldtimer
Hey there, Thanks for reaching out to us! Had to dig deep on this one, hit up my main man Mike at Marmot! He let me know that this bag has 10 inches of loft. Hope this helped you out!
Answered by: Rocko Gigsby
Date published: 2017-03-27
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- + Size Guide
MARMOT GEAR FIT GUIDE and INFO

SLEEPING BAGS
Marmot offers a variety of sleeping bags with different fit specifications. In order to find the best fit for you, please follow the instructions below:

• Click on the PRODUCT DETAILS tab on the product page of the sleeping bag you're interested in.

• Look under the Product 'SPECIFICATIONS' header. From there you will find specific info on bag weight, dimensions, and the body meausrements that will fit that specific sleeping bag.

• Please double check that you clicked on the correct size before you order. Often times there are multiple size options on one product page, so please be sure to verify you've selected the right one. Sorry to sound so bossy.


BACKPACKS
Choosing the correct fit for a pack is vital, and Marmot offers multiple fit and size options in order to accommodate all body types. In order to find the best fit for you, please follow the instructions below:

• Click on the PRODUCT DETAILS tab on the product page of the backpack you're interested in.

• Look under the Product 'SPECIFICATIONS' header. In this section you will find helpful info on what sizes that specific product will fit, including torso fit range and how much weight the pack can hold.

• Please double check that you clicked on the correct size before you order. Quite frequently there are multiple size options on one product page, so verifying that you've selected the right size is SUPER important. So annoying, I know. Please don't hate me.


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