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A chilly-weather trekker's best friend.

The Marmot Never Summer 0-Degree Down Sleeping Bag gives you a warm night's rest when the mercury dips, and you're set on playing outside. While the Never Summer has heavy-duty chill-blocking power, the down fill and nylon ripstop keep it compressible and light enough to haul on a multi-day trek.

  • Zero-degree rating and an EN lower-limit rating of 2.5 degrees Fahrenheit means this bag will get you through a night when temps approach zero; you'll be able to sleep comfortably with temps in the mid teens
  • 650-fill down provides serious insulation against brutal temperatures
  • Nylon ripstop fabric shell is lightweight and durable
  • Semi-mummy shape holds warmth close to your body while giving you a little extra room to move
  • Trapezoidal foot box follows the shape of your feet for a comfortable fit and better loft
  • Nautilus five-baffle hood mimics the design of Marmot's down jackets to give your head three-dimensional protection from the cold
  • Heat Bump draft tube prevents cold air from seeping in between the zipper's teeth
  • Stuff and storage sacks let you pack your bag tight when you're on the go and let it air out and decompress when you're at home
  • Stash pocket holds essentials, and a heater pocket in the foot box lets you drop in a handwarmer to keep your toes toasty
  • Two hang loops let you air your bag out after (or during) trips

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Marmot Never Summer Sleeping Bag: 0 Degree Down

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Here's what others have to say...

5 5

<0 degree.

Well this is the best bag I have ever purchased. I used it to camp the night before we winter ascended a 14'er. It was -10 with a few inches of fresh in the morning. It was epic.
I DO NOT recommend you trying this. I also had a lot of waterproofing gear and such.
The fact of the matter is, I've been cold in bags before. I have not been cold in this one yet.

Responded on

Glad to hear you had a great trip andslept well Soops. This really is a great bag.

5 5


  • Familiarity: I've used it several times

This sleeping bag is great. Definitely not the lightest or most smallest 0 degree down bag this thing certainly gets the job done. Very warm and soft against the skin. Enough room for a little movement inside there, not crammed in like a sardine. I honestly cannot think of one bad thing to say about this bag. I would definitely recommend this to anyone doing some cold weather camping, especially if weight and size are not an issue.

5 5

Warmth for day!

  • Familiarity: I've used it several times

Awesome bag especially for the price. It's an amazing products once again Marmot has made a really great product something that I gladly added to my collection. Haven't had it down into the single digits yet but soon enought it will be. It has stood up great. Overall really impressed with the quality.

5 5

The 0 degree bag thats actually good at0

  • Familiarity: I've used it several times

The never summer is a heavy duty winter bag that won't disappoint when used at 0. Use it at 20, and you'll be fine, but at 40 you'll die. Well designed to keep heat in when its cold, and when its hot too, so you'd better have another bag for summer and even fall. But when it falls low this is the answer. I have a similar bag with the membrain fabric which isn't really necessary unless you're in a snowcave or something similarly wet.

5 5

Diddo everything!

  • Familiarity: I've used it several times

I just want to diddo everything that everyone else has said. This bag is a great oven! I lover the draft collar, it really does help in extreme cold. Whenever it gets cold I bust out this bag! The orange is solid too! SO great!

Diddo everything!
4 5


  • Gender: Male
  • Familiarity: I've put it through the wringer

I have had this bag for 8 years now and it looks new. The quality is top notch and mine has not shed any down over the years. Rarely have I needed this bag full zipped up as it is extremely warm. I have winter camped in this with temps below 0 F and have been comfy. It packs pretty small for a bag rated to this temperature and is fairly light as well. It works well at elevation and the draft collar really works to keep heat in and cold out. I recommend this bag to anyone needing a really warm bag. I am 5'10" and 165 lbs and the regular fits me well. For someone my size this has plenty of shoulder room.

4 5

Good god this thing is warm!

  • Familiarity: I've used it once or twice and have initial impressions

Well Ed pretty much hit the nail right on the head with his review. Just to back him up, this thing is smokin warm! I haven't pushed it to the extreme yet. I have a mountain hardware Trango 3.1 that come first blizzard i will be pairing up with this bag. I jumped into this thing and within seconds it began to warm up, and warm up and warm up some more. Less than a minute I was dragging myself out of it. Like Ed said, don't bother using this bag unless the thermometer reads 0! Don't bother with layers or thermals either. The bag will do the work for you.

Good god this thing is warm!
Responded on

Super cool! I'm so glad it's working out for you!

4 5

Stick a fork in me... I'm done.

I have the previous model of this bag and all I can say is... this thing is a freakin' oven. The 0 degree rating must not mean it's good down to 0 degrees, instead it implies that you shouldn't get in it unless it's actually 0 degrees or you'll roast. Most trips (Continental Divide, Colorado, above tree line, early spring/late fall) I end up using it like a blanket instead of getting inside of it. I'm not a warm sleeper either, normally I get cold at night. Marmot makes a great product and they certainly don't skimp. I have noticed that this bag sheds a little more than some of the more expensive bags. Nothing horrible though.

Responded on

Ed thanks for the awesome review and added humor. Becuase of this I have also ordered one. I found myself caught unprepared for the first time after many years experience of running around in the outside elements. Your humor brought on some much needed laughs on a cold, wet and otherwise very crappy night. Thanks again

Responded on

Thanks for the kind words, Dan! Glad someone read it. I've had nights like that... no fun. I don't think you'll be disappointed in this bag. Cheers!

Responded on

Another tip, Dan. I've found that these fit snuggly into a Granite Gear small compression sack. Get's this thing down to about the size of a football on light and fast trips.

Responded on

Ed. Thanks for the added input! I was checking some out the other day while in E.M.S and wasn't sure which one to grab. I'll have to pick that one up