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Marmot Never Summer Sleeping Bag: 0F Down

$300.95 - $323.95

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  • Reg/Left Zip
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Make an effort to ditch the crowds.

Summer might bring mild weather, but it also brings crowded trails, so use frigid winter temps to your advantage and head to the mountains with your Marmot Never Summer 0 Degree Down Sleeping Bag once the temperatures drop. Stuffed full of Marmot's water-resistant Down Defender 650-fill down, the Never Summer is rated to keep you warm when temperatures drop to single digits, and its ripstop fabric has been treated with a DWR coating for a bit more protection from light snow flurries and condensation that might accumulate along the walls of your tent. The Never Summer bag has a basic mummy shape with an anatomic footbox to give your feet some extra room to roam, a Nautilus hood that cinches down tightly around your noggin, and a full-length zipper that's backed by a snag-free insulated draft tube to help prevent heat loss through the zipper. There are also internal stash pockets the make it easy to keep your headlamp and a small midnight snack where you can reach them.

  • A durable and heartily warm sleeping bag for winter overnight adventures
  • Folding zipper offers ventilation and easy access
  • Anatomical footbox adds more room and more warmth
  • Down Defender insulation resists water and stays warm
  • Internal stash pocket footbox heater pocket adds warmth and storage
  • Stuff sack and storage sack included
  • Item #MAR01BH

[main materials] 20d 100% nylon mini ripstop, 30d 100% nylon DWR, [lining] 20d 100% nylon
650 fill power down with Down Defender
Down Defender
full length locking YKK two way zipper
Max User Height
[regular] 6ft, [long] 6ft 6in
Shoulder Circumference
[regular] 62in, [long] 64in
Hip Circumference
[regular] 56in, [long] 58in
Foot Circumference
[regular] 48.5in, [long] 50in
Bag Length
[regular] 83in, [long] 89in
Draft Tube
internal stash, heater pocket
fold-down second zipper
Fill Weight
[regular] 31.7oz, [long] 33.5oz
European Norm Comfort Rating
European Norm Lower Limit Rating
Storage Sack
Stuff Sack
Stuff Size
8.5 x 18in
Claimed Weight
[regular] 3lb 3oz, [long] 3lb 10oz
Recommended Use
backpacking, weekend camping
Manufacturer Warranty

Tech Specs

What do you think about this product?


>Rating: 4

keeps me toasty

I've put it through the wringer

I picked this up and have been using it over the past summer season in Alaska. it has kept me plenty warm and dry. I also love how small it packs up.

>Rating: 2


I've put it through the wringer

I thought I would have this sleeping bag to use for YEARS! I guess not. It is the fourth year I've had it and I am now getting cold! I've had to buy a quilt for the last year to stay warm. I'm in temps within the bag's rating. I did not expect nor want to replace the bag within 4 years. Disappointed! If you want a bag to last for many seasons, this is not the one.

Hey Tracy - Try washing your bag with a down detergent. Unless you have a hole in your bag, you haven't lost any loft, it's just got compressed from oils. It's all still there, just needs to be cleaned. I've washed my bag before and it lofts right back up.

Как вы его использовали, как часто? Dear friend. How did you use it, how often? Did you use the mat with it? I want to buy it. Thank.

Dear friend, what choice have you made? What do you recommend?

>Rating: 5

Best Graduation Gift Ever!!

I've put it through the wringer

Years back, I was over all the freezing cold camping experiences I had had. Since getting this bag (possibly an older model), no more of those. Now I literally look forward to camping as an excuse to use this thing! It's like sleeping on a cloud, so soft, zipper slides easily. The orange flap near the top keeps my neck warm, and it can cinch down around my face on really cold nights. The anatomic footbox allows big feet (tall) to be comfortable while sleeping on your back but still stay warm. After six years of great use, it's still my favorite camping item in my closet, hands down.

>Rating: 5

Warm and comfy

Took this bag to Kansas this January and spent a couple of nights hiking the Elk River Trail. Temperatures were in the 20’s one night and low teens (almost single digits) the next. I would consider myself a “cold” sleeper and I stayed plenty warm in the bag with just light weight base layers on. Did not have any problem with the zippers snagging and the draft collar kept the cold air out. The bag has great loft. To quote one of my trail companions “that is one puffy bag”. There are lighter bags out there but those bags will also lighten your wallets much more. For the price point I could not have been happier


Unreal warmth/weight/cost ratio!


Ditch the tent on those starry nights

>Rating: 5

Winter Wonderland!

I've used it several times

My wife and i took a winter camping trip to the Uintas, and this bag was an essential tool for staying warm(while sleeping). The temperature was logging in around 5 degrees, which by human standards is quite cold. Thankfully the Never Summer sleeping bag kept me and my life partner warm and toasty all throughout the winter's night!

>Rating: 5

Lightweight, warm, and compact.

I've used it several times

This sleeping bag is great for late fall to early spring adventures. I am a big time backpacker so I needed something that will keep me warm on the frigid desert and mountain nights. It packs down to 8.5 x 18 in the stuff sack and only weighs [regular] 3lb 3oz, [long] 3lb 10oz so you will still have plenty of room in your pack for other items. It has a very durable non catch zipper, a foot box for extra room to move around, a pouch in the foot box to put hand warmers to heat your feet on the coldest nights, and down defender which makes the bag water resistant. I think it is the best 0 degree lightweight down bag in the similar price range. I have used it in some chilly nights already under 30 degrees, I was toasty in the bag with just a t-shirt and shorts on in the bag. I use it with the Sea To Summit Ultralight Insulated Sleeping Pad.

>Rating: 5

Solid Option for Cold Weather Camping

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

I took this out for its first test run in 20 degree weather. The bag was great. Kept me too warm so i ended up unzipping it to dump some heat. Zipped it together with my marmot never summer bag so the girlfriend and I could share some body heat. The two mated together perfectly fine and didn't seem to be too awkward even though they are both mummy bags. As with any sleeping bag, make sure you pair it with a quality sleeping pad so you don't lose heat to the ground once the down compresses under your weight.

Thanks for the solid review Brian! Solid advice like yours helps out our community and other customers a ton.


Hello So I live in the Pacific Northwest and I plan on doing some high altitude late season backpacking trips, im curious about the water resistance of this bag and then how well it can keep the warmth when damp.


Can a left zip and right zip bag be joined for sleeping together? This a must for my wife since she requires her personal heater (me).


I'm 6'3'', should I get the long version or just the regular?


what are the washing instructions for this bag?

Hey Cathi! There will be washing and care instructions sewn into the bag on the inside, as well as this video at this link for Marmot sleeping bags: