Marmot  Never Summer 0 Sleeping Bag

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Marmot Never Summer sleeping bag is great for climbs and treks when subfreezing weather is imminent. Water-resistant 650-fill-power down ensures warmth amid the vagaries of shoulder-season weather.

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Features

  • Water-repellent, certified 650-fill-power duck down insulation with Down Defender is protected by a durable nylon shell that has a water-repellent finish to shed condensation
  • Down is certified to the Responsible Down Standard (RDS) by Control Union
  • Anatomic wraparound footbox increases insulation and room for your feet to enhance warmth and comfort
  • Nautilus multi-baffle hood envelops your head in warmth; down-filled collar with easy-access drawcord also adds warmth
  • Draft tube backing the full-length, snag-free YKK 2-way zipper prevents cold air from seeping through
  • Fold-down second zipper provides added ventilation and easy access
  • Internal stash pocket; heater pocket in footbox lets you add a heat packet for cozy warmth; heater packets sold separately
  • Includes stuff sack and large storage bag

Imported.

Temperature ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth, since many different factors contribute to your comfort while you sleep. Backpacking bags are typically rated for temperature according to an independent testing protocol—currently International Organization for Standardization (ISO) 23537, though some older items followed European Norm (EN) 13537. Testing is based on a person wearing one base layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38.

Each bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
View all Marmot Backpacking Sleeping Bags

Technical Specs

Best Use

Backpacking

Tested Lower Limit

-4.7 degrees (F) - EN

Tested Comfort

9.5 degrees (F) - EN

Temperature Rating (F)

0 degrees (F)

Temperature Rating (C)

-17 degrees (C)

Shell

20-denier mini ripstop nylon

Zipper Location

Left

Insulation Type

Down

Water-Resistant Down

Yes

Fill

650-fill-power duck down

Lining

20-denier nylon plain weave

Sleeping Bag Shape

Mummy

Stuff Sack Size

9 x 18 inches

Stuff Sack Volume

16.8 liters

Gender

Unisex

Sustainability

Down certified to the Responsible Down Standard (RDS)

Reviews
126 reviews with an average rating of 4.7 out of 5 stars

Ratings Snapshot

Product Rating

80 out of 86 (93%) reviewers recommend this product

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Average Customer Ratings

Product Weight

LightweightHeavy

Ease of Use

Difficult to useVery easy to use

Most Helpful Favorable Review

5 reviews with an average rating of 4.0 out of 5 stars
Good Value
JoeHiker
7 years ago
Great bag for the price. The lower temperature rating and lower fill rating means it's not going to compress super small, but it sleeps comfortably in a variety of conditions. I used it up on Kilimanjaro including a night in the crater and was quite comfortable, though I sleep warm. I'm 6'4" and the long fits great.
JoeHiker
Raleigh, NC
20 people found this review helpful

Most Helpful Critical Review

5 reviews with an average rating of 3.0 out of 5 stars
Smaller than they say it is
Nursingzombie
7 years ago
Great bag for the price, slew of features and mummy time action. Per the stated demensions listed on the long bag- they measure the outer ring of the shoulders and NOT the inside. For info- im 6’2 255lbs, my shoulders are 54” and bag states accommodates 61” if i remember. Bought at store on rep recommendation, and didnt try it out there. @home 3 days later/ laid out on bed and did use my cocoon liner in boxers- and couldnt zip it up over my armpits. Pros- down, 20 secs was smoking hot in bag, great construction, toe box fit my 12 sized feet,its light in weight (backpacking), and feels solid w compression bag/mesh bag included. Downside- not gunna fit a big guy or gal. I went with a northface One bag- long// fits great and very versatile for 4 season needs. I would recommend the never summer- but only to 6’2 and under with less than 50” shoulders. Think slim stick people-
Nursingzombie
Santa Barbara
16 people found this review helpful

Customer Images

NORSA82
Washington, DC
Rated 5.0 out of 5 stars

22 years old and going strong

2 years ago

[This review was collected as part of a promotion.] I purchased a left-zip Never Summer zero degree bag from Hudson Trail Outfitters in 2000 back before I was even a retail employee there. 22 years later, it is still my go-to winter camping bag. Yes, I only winter camp one night each year, but I haven't missed a trip once in the past 20 years since a group of us started the tradition of a late-Nov to early-Feb trip annually back in 2000. this bag has seen nearly every peak in the GW&TJ National Forests and most of Dolly Sods. It has kept me comfortable in Fahrenheit weather down to the low teens and kept me safe and relatively warm to temps even lower still. The lowest I've experienced with this bag was -11 Fahrenheit overnight in Ramsey's Draft Wilderness, and many of my friends decided to upgrade their gear after that trip, but my Marmot bag not only held its own, but I was actually able to get several hours of sleep overnight while everyone else shivered and froze through the night. While I would say that taking a 22-year-old version of this bag into zero degree weather might not be perfect, the it is probably the best value for the money you will be able to find out there today. So, in sum, if the materials and upgrades over the past 22 years mean that this bag is even more formidable than my ancient version, then do yourself a favor and grab one for your next cold-weather excursion!!

Yes , I recommend this product
Originally posted on marmot.com
Morgs
Milwaukee, WI
Rated 1.0 out of 5 stars

Bought two, both came with holes.

5 years ago

I'm very disappointed. I bought this sleeping bag because of the great reviews. I opened it up when it arrived and feathers were everywhere. I found a few small holes where the stitching was missed. I returned it and got the same one shipped to my house. As it turns out, the second sleeping bag also had a small hole where the stitching was missed and feathers were coming out. I expect more from a $300 sleeping bag from REI. Hopefully this can be resolved otherwise I'm going to be going to Cabela's to purchase a sleeping bag for my backpacing trip this coming week.

Age:25–34
Weight:200–225 lbs.
Height:6'1"
No, I do not recommend this product
Helpful?
Aaron662c
California
Rated 5.0 out of 5 stars

Had it two years now. excellent bag!

6 years ago

I’ve had this bag for two years now and I have to say I’ve been very impressed. I’ve slept more than a dozen nights with the temperatures in the teens. And also once with -7F with the windchill. I have been really warm and still needed to poke my foot out of the bottom(you can unzip from the bottom up to use as a vent). For the money this is a very good bag. I had been looking at much more expensive low temp bags and decided to give this one a shot. Glad I did. It’s been plenty warm and I probably saved a couple hundred dollars over the other bags I was looking at.

Yes , I recommend this product
Helpful?
Ianjt
Idaho
Rated 5.0 out of 5 stars

Warm and cozy

6 years ago

I don’t often review, but I wanted to offset some negative ratings and help this bag’s reputation. It’s a great winter sleeping bag. It lofts up pretty well for being 650, and it’s incredibly soft. I have slept in below 20 several times, twice with frost covering the bag, and have stayed nice and warm. The zipper doesn’t snag, the baffle stays put, and the foot box is surprisingly roomy. I never used the older version of this bag, but it appears that Marmot made some changes from what it used to be. I think it’s marginally heavier, but generally warmer. The “comfort” rating is 9.7f as opposed to the old 12.7f. There is also more insulation weight in this model. Both models compress to the same size.

Yes , I recommend this product
Helpful?
Skihikefish
Smoky Mountains
Rated 5.0 out of 5 stars

Great for money

6 years ago

Shopped for years for a zero degree bag - I take too long with big buys. I always bumming ones from buds bc they’re such an investment, but I do a good deal of winter backpacking and skiing and wanted one of  my own.  I’m 6’1”, and a pretty big (46L coat, 36”waist). The long fits me quite  well. It’s snug, but appropriately for a winter bag. I sleep cold, and first night I had it out it was in the single digits, went from rain> freezing rain> snow in an AT shelter. I slept great and hated getting out of the bag in the AM. Worth the $$ for the weight, material, size, pack-size, etc. 

Yes , I recommend this product
Helpful?
Frobisher
Western PA
Rated 5.0 out of 5 stars

Ingeniously awesome!

4 years ago

In a word, awesome! Sure, it’s a 0 deg down bag with 650 fill, blah, blah, blah. What separates it from all the others, though, is the second short zipper in the right side. It’s ingenious. It makes dealing with the hood so much easier. A hood, by the way, that uses 2 different styles of cords so you can tell the difference by feel which is which. The way the hood is cut also avoids having the chin cord going across your nose. It’s the simple things done well that makes this bag rock! It’s probably the best bang for your buck in a sleeping bag today

Age:45–54
Weight:175–200 lbs.
Height:5'10"
Yes , I recommend this product

Product Weight

LightweightHeavy
Helpful?
JoeHiker
Raleigh, NC
Rated 4.0 out of 5 stars

Good Value

7 years ago

Great bag for the price. The lower temperature rating and lower fill rating means it's not going to compress super small, but it sleeps comfortably in a variety of conditions. I used it up on Kilimanjaro including a night in the crater and was quite comfortable, though I sleep warm. I'm 6'4" and the long fits great.

Yes , I recommend this product
Helpful?
C BB
BC, Canada
Rated 1.0 out of 5 stars

Very poor quality/disapointing

3 years ago

My partner and I bought 2 Marmot Never Summer -18 C sleeping bags in Canada. The bags were very disappointing. I used my marmot sleeping bag on 2 expeditions and went back to my 15 years old MEC bag which is still warmer and more breathable. On our first expedition using these Marmot bags, we were both cold at only 0 Celcius. The down kept moving to the sides and making clumps, leaving not much insulation above. The material was also very wet every morning in the Yukon which has pretty dry climate and where our MEC bags worked very well. The bags were very disappointing but Marmot has a good warranty though and took them back, which we really appreciated.

No, I do not recommend this product
Originally posted on marmot.com
Sammy K
Ennis, MT
Rated 5.0 out of 5 stars

Best bang for the buck

6 years ago

Perfect 0 degree bag and less expensive than most down bags out there. Took this bag into the Wind River Range for 2 weeks in late April and it kept me warm every night. Got into the low single digits a few times and I was never cold. Love the extra foot room the bag provides and extra room in general. I could have boot liners, water bottles and a jacket or two drying as I slept and not be cramped. Light enough and packs down well. Dried out very quickly from the condensation on the inside of the tent each morning and never got close to soaking through. All in all very impressed with this bag and the price is right.

Yes , I recommend this product
Originally posted on marmot.com
Kevin G
Glasgow, Scotland
Rated 5.0 out of 5 stars

Warm, light and compact

5 years ago

[This review was collected as part of a promotion.] I've had this sleeping bag for two winters now and have always been impressed by its warmth, comfort and compressibility. The warmth to weight ratio is impressive and zips, pockets and toggles are well placed and of good quality. I'm always pleasantly surprised with the size this sleeping bag can be compressed to, given its impressively low comfort temperatures. There is some leakage of down feathers but no more than should be expected. Very happy with this product overall.

Yes , I recommend this product
Originally posted on marmot.com
1 - 10 of 126 Reviews

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