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A winter trekker's best friend.

The Marmot Never Summer Sleeping Bag is your best option when the mercury dips below freezing and you don't want to suspend your plans to play outside. However, considering the Never Summer's chill-blocking power, you'll be amazed at its packability and manageable weight. After all, what's a few extra ounces in the pack when it means that you're toasty warm in the middle of the frozen tundra?
  • The 600-fill goose down insulation offers excellent warmth-to-weight ratio and extra-lofty construction for supreme warmth
  • Durable nylon shell features a water-repellent finish to protect the down insulation from frost, dew, or condensation
  • Down-filled draft collar and Heat Bump draft tube protect areas where cold can creep in unexpectedly
  • Ground-level side seams allow the top layer of insulation to wrap fully over the body like a blanket
  • Easy-adjust cords mean that you won't be fumbling around at night trying to get comfortable
  • Stretch baffles keep insulation in place so cold spots won't develop when you roll around or adjust your body
  • Trapezoidal foot box has a slight forward lean that matches the shape of your your feet, allowing more room to move around without creating a cold spot
  • Heater pocket in footbox lets you add additional warmth
  • Nautilus 6 baffle hood traps in extra warmth; Face Muff shields your face from bitterly cold air and won't irritate your skin

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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

wonderful bag!

worlds difference from my REI 20 syenthetic bag! down is so awesome! Used on Mt. Rainier in May winter storm condition, and it's warm! Thanks Marmot!

5 5

Incredible bag

Awesome sleeping bag, reaally confortable, compressible and warm. It is great to zipp two sleepping bags toghether!!!!!!!!

5 5


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

I just bought this bag and slept in it on just a foam pad. The weather was between 0 and 10 degrees all night and i stayed hot. I wore a pretty warm base layer of clothing because i didn't want to risk being frozen and I ended up really hot. Overall awesome bag if warmth is your main concern.

What size compression sack would you want...

Posted on

What size compression sack would you want to get for this bag in regular size if you are getting the ALPS Mountaineering Cyclone Compression Sack?

Responded on

I would say you could get the M.

Will this bag work in a hammock? And does...

Posted on

Will this bag work in a hammock? And does bag has a storage case to put it into? And how big is the bag when stored in bag?

Responded on

Yes, this bag will work in a hammock, but you might want to try the model with the more water repellant "Membraine" shell. Marmot includes a nylon stuff sack (but you'll probably want to replace with a compression sack) and a cotton storage sack. When stored in the storage sack is approximately the size of a medium-big cooler.

Responded on

I use mine in a hammock and it's great! Just use a sleeping pad with a decent R-value for insulation since the part of you that presses up against the hammock is more prone to become cold (same as if you didn't use a sleeping pad under you in a tent, the ground would keep ripping away heat). I use a Thermarest Trail Scout (R-Value of 3.7) and I never get cold. Highly recommend!