Filled and Finished in Rohnert Park, CA with 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
Nautilus 6-Baffle Hood
"Feely" Draw Cords
Down-Filled Draft Tube
Ground-Level Side Seams
Hidden Draft Tube Pocket
Stretch Tricot Baffles
Velcro®-free Down-filled Collar
Zipper Guards
Stuff and Storage Sack Included
Description
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. 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.
Rated 5 out of
5 by
Riah from
The Bag of BagsI bought this bag for using in the winter in Utah during my wilderness therapy stints. It is super warm, waterproof (to a point. If it sits in a puddle, after a few hours water will soak through), and actually packs down pretty well.
My only complaint is it definitely doesn't fit in the stuff sack you're given. I just bought a Sea to Summit 30L waterproof eVent stuff sack and that did the trick. Plus it has those handy tightening straps to help compress the bag.
The long is nice because you can put stuff at the feet you don't want to freeze. Just be careful though, the long is also a bit wider and you'll be cold if it's too big.
Date published: 2019-10-02
Rated 5 out of
5 by
Grizzled from
One of the best investments I ever made!Let me start off by saying that I have owned this sleeping bag for at least 5 years and spent at least 100 nights in it. It has kept me toasty warm to below -40 through all of it and hss exceeded my expectations with many years of service left in it. I have always used a sleeping bag liner and on any longer trip I employ a "vapor barrier liner" to extend the duration the bag retains its loft and reduce its packed weight (in my case not as much a concern as packed size/ longevity of down). Durability is excellent for such a lightweight bag and it has withstood the compression cycles much better than any synthetic bag can . The waterproof/ breathable shell has made managing frost so much easier but it does make compressing the bag harder. Roll it into a huge roll and lean on it gently to force air out then quickly unroll and reroll, into the compression sack and start yanking/ squishing. I respect this bag so much that it is always stored layed out or hung and fully lofted.
Date published: 2019-03-17
Rated 5 out of
5 by
ThinAir from
The best bag I've ever ownedI've had my CWM -40F bag in service now for over 7 years and use it countless times each year in the high and cold altitudes of Colorado. I've used this bag innumerable times in temps in and around -10F and I never get cold. In fact, I hardly ever zip into the bag, usually just having it draped over me is more than sufficient even in very cold conditions. The loft has held up amazing well and I use it all the time. This bag is pricy but is worth every penny, and it will last and perform beyond expectations, that has been my experience thus far.
Date published: 2020-11-21
Rated 5 out of
5 by
Mountaineer266 from
A Bag for the Extreme ColdI purchased this bag last month and have been extremely impressed. Superb construction with attention to detail. Best loft I have ever seen in a sleeping bag. Highly recommend.
Date published: 2018-10-13
Rated 5 out of
5 by
Codyb from
perfect!!!perfect fit I am 6' and I am glad i bought the long
Date published: 2017-11-01
Rated 5 out of
5 by
ocka from
A great bag indeedI have had this bag for 3 years and never cold in it, if anything I have the bottom zip open. Great for the snow and great for using outside the tent.
Date published: 2018-08-10
Rated 5 out of
5 by
climbermike85 from
This is soooooooo warm when it is soooooooo cold!I bought one for my Wife and one for me years ago and they still work great. These bags keep us warm if it is below zero and we really NEED to stay WARM! It is nice to have that security when you are miles from the car.
Date published: 2020-05-01
Rated 1 out of
5 by
JimGriffs from
Poor zipper choice, not warm enoughI used this on Everest, and found that my 25yo Western Mountaineering bag was warmer than the Cwm.
The small-gauge zipper often jammed, and rarely slide to the top of the track. Very frustrating in the middle of the night, particularly with temperatures that low.
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