- Features
- Certified 600+ Fill Power Goose Down
- EN Tested
- Down-filled Collar with Easy Access Draw Cord
- Heat Bump Draft Tube
- Nautilus 6-Baffle Hood - 6 Chambers of Down Around Head for Better Down Control and Fit, Hood Cord is Positioned for Easy Access
- Classic Trapezoidal Foot Box - For More Foot Room
- "Feely" Draw Cords - Ease Nighttime Cord Fumbling
- Ground-Level Side Seams - Eliminates Drafts
- Heater Pocket in Foot Box - For Heat Packets
- Hood Draw Cord - Positioned for Easy Access
- Locking Zippers - Keep the Bag from Opening Up in the Middle of the Night
- Stash Pocket - For Nighttime Essentials Such as a Watch or Energy Bar
- Stretch Tricot Baffles - Provide Ultimate Strength, Durability and Bag Life
- Stuff and Storage Sack Included - Store and Pack Just Like Your Sleeping Bag
- Two Hang Loops - On the Outside of Foot Box for Airing Out Your Bag
- Two Way Zipper Sliders - For Venting and Mating of Bags. Reversible Slider Tabs for Easy Use Inside or OUtside of Bag
- Velcro®-free Face Muff - Keeps the Drawcord and Zipper Away from Your Face
- Zipper Guards - Help Repel Biting Zipper Coils
- Linked Styles
- Style Name:Never Summer Long
- Style Number:2191
- Weight:4 lbs / 1814 g
- Fill weight:32 oz / 907 g
- Price:$309.00
- Style Name:
- Specs
- Colors:
- Bonfire/Sauce (9287)
- Weight:3 lbs 14.46 oz / 1771 g
- Fill Weight:30 oz / 850 g
- Size on Hip:58in/147.32cm
- Size on Foot:40in/101.6cm
- Main Material:100% Nylon Ripstop AC 1.3 oz/yd
- Main Material:100% Nylon WR 1.4 oz/yd
- Lining Material:100% Polyester Dobby WR 2.2 oz/yd
- Insulation Material:600+ Fill Power Goose Down
- Colors:
Marmot Tech Manual
If you are a tech geek and want to know everything about our current technologies, click here to download our tech manual.
600 Fill Down

Certified 600 Fill Goose Down bags are constructed with the following features:
- Nautilus Hood: the same construction as our 8000m jacket hood, a 3D hood that
wraps around your head and reduces heat loss. - Hood Muff: creates a warm down gasket around your face, keeping the drawcord
away from the face. - Stretch Tricot Baffles: allow the bag to be stuffed and unstuffed without tearing the baffle material.
- Trapezoid Foot box: matches the shape of your feet, wider in the toe area and narrower in the heels.
- Down Fill Oversized Draft Tube: eliminates cold spots
- Zipper guard: keeps the draft tube fabric from getting caught in the zipper
- Ground Level Seams: top layer wraps fully around the body creating a warm layer of down.

Down
From the beginning, down has been Marmot’s foremost insulator. No synthetic surpasses the lightweight, compactability and longevity of down.

Marmot Down DNA:
Down is in our DNA. Marmot was founded in 1974 as a manufacturer and seller of premium quality down jackets, vests and sleeping bags. To this day we only use the finest quality certified goose down for our down insulated outdoor products. Mountaineers and outdoor enthusiasts worldwide rely on Marmot down gear for warmth, comfort, and sometimes survival.
Marmot Down Quality:
Down quality is determined by fill power and durability which is dependent upon the age/maturity of the bird and the processing of the down. The best down comes from larger, more mature birds and goose down is better than duck down (when age/maturity are equal). More mature goose down has larger filament clusters than less mature goose down. These clusters, when grouped, provide many more trapped air pockets and therefore provide better insulation. To maximize the effectiveness of the down clusters, the proper processing of the down (sorting, washing & drying) is required to open them up.
Higher fill power means higher loft, better insulation, lighter weight, and greater durability. We test all of our down for content, cleanliness, species, and fill power. We guarantee minimum fill power for all of our down clothing and sleeping bags. That means, for example, that our 800 fill sleeping bags are guaranteed to have at minimum 800 fill power. We don’t believe in + or – variation when it comes to comfort.
Down Origins:
Down is the light, fluffy undercoating at the base of the feathers of waterfowl. Down is a multi-dimensional structure that insulates by creating pockets of still air that retain body heat. Down is highly breathable and exceptionally comfortable. Pound for pound, high quality down is the most efficient natural insulator there is.
Geese are raised primarily for food and the down that is derived from them is a by-product of the food industry. Geese are raised on large and small farms and roam free outside on these farms. This is their natural environment. They are not raised indoors in controlled conditions. Geese are grain fed and also have access to local plant life.
Geese are generally harvested after 4-9 months for food. Some female geese are kept for breeding stock and are harvested between 1-2 years. These are the geese called the “mother birds” that provide the best, most mature down. After the geese have been harvested for food, the down and feathers are removed, washed, dried and then sorted by separating the down and small feathers from the larger, heavier feathers. These processing methods determine the final quality and fill power of the down. Marmot currently buys down primarily from Russia, Poland & China.
Marmot Guaranteed For Life:
Since 1974 we’ve guaranteed every product we’ve made for the life of the product. We believe the best thing for everyone and the environment is to make products that last.
Have a closer look - download the Marmot down desktop and keep your computer warm.

EN Tested
How do I read the EN information?
Basically the EN graphic shows a temperature range:
| Comfort Limit | The first number is based on a standard woman having a comfortable nights sleep |
| Lower Limit | The next number is based on a standard man at the lowest temp to have a comfortable nights sleep |
| Extreme Rating | The last number is a survival rating for a standard woman |
For example, the rating on our Pinnacle 15º Sleeping Bag shows:
| Comfort Limit | 22.2 degrees |
| Lower Limit | 10 degrees |
| Extreme Rating | Minus 24.7 degrees |
This can be helpful in selling on the floor. Below is an example dialogue between a female customer and a store employee.
Female Buyer - “I think I need a 15 degree bag.”
Store Employee – “What temperatures are you expecting on your trip?”
Female Buyer – “Between 15 and 25 degrees. I tend to sleep cold however.”
Store Employee – “You can definitely use this Pinnacle 15 bag, but you may consider buying a Zero degree bag to sleep more comfortably at the lower temperatures.”
Facts don't lie!
Marmot began as a sleeping bag company and we continue to pioneer performance, value and insulation standards in the outdoor industry. All Marmot sleeping bags are EN tested to ensure quality and performance. During the development process, we send all samples to the Thelma Testing Center in Norway. We continually use the Thelma Center to achieve continuity in our results.
What is the EN 13537 test? EN, short for European Norm, is a government test for sleeping bags.

How is the EN test conducted? First let’s be clear that it is challenging to test temp ratings because there are so many variables. Every person will sleep differently in the same bag. Choices like clothing, sleeping pad, tent or no tent, eating and drinking before bed can all affect one’s sleeping experience. For the EN test, a copper mannequin named Charlie is fitted with 20 sensors and a clothing layer (top, bottom, and socks) that provide a consistent thermal value. The mannequin is placed in the sleeping bag and put onto a wood platform roughly 12mm thick. The board is held above the floor with some support which allows air circulation under the board. The board is covered with a mattress that has a consistent thermal value then placed in a cold room. A mathematical formula is used to measure the data received from the sensors based on human modeling.
Why is there an EN Test hangtag on Marmot bags? Marmot sleeping bags sold in Europe require this testing and hangtag. We include this hangtag on all of our bags, as we believe it is the most reliable and accurate measure of the performance of a sleeping bag currently available.
How does EN testing differ from other methods and is it better? When Marmot first started testing bags, especially when we used Gore-Tex® fabric, our designers would go into meat lockers and sleep over night. Once they were able to sleep through the night they looked at the amount of fill to determine the temp range. Nowadays it is a bit more scientific. The testing method used in the US is very similar to the EN test. They use a copper mannequin, but the clothing, pad, and math formula are different. Again we feel the EN test is the most reliable and accurate measure of the performance of a sleeping bag currently available.
Has the feedback from the EN testing improved the designs of Marmot bags? Yes it has. The vast majority of our bags have tested to our current temp ratings. In some cases, the tests showed our bags were actually warmer than the rating we gave it. In another instance, there was a spot that showed room for improvement which led to more efficient baffle construction. With our baseline testing started in 2004, we can now measure improvement over time through new fabrics, insulation, and construction techniques.
Will the EN test become an industry wide standard? That is unknown. Currently our industry can’t agree on how the testing should be done because of all the variables. The European government has stepped in and taken control of standardized testing. For the meantime, Marmot will continue to test with the EN standard.
Marmot rating vs. EN rating?
Marmot’s assigned temperatures are comparable
to the EN lower limit rating.
During Marmot’s development process we send
all samples to the Thelma Testing Center in Norway.
Continually using the Thelma Center allows us to achieve continuity in our results.
Backpacker 3/06 Never Summer
Bargain!
This overstuffed 600-fill-power down bag won’t commit the cardinal sin of leaving you colder than its 0 degree rating. While heavier than some competitors, it kept testers snug in –10 degree F temps, thanks to 30 lavish ounces of feathers, a thick draft collar, and a secure hood muff that seals tightly around the face. It quickly became a favorite of our cold-sleeping Rocky Mountain editor, who used it as his go-to utility sack all through last fall, winter, and spring. He also appreciated the extras you get for the relatively economical price, like the zip chest pocket and even a small pocket in the footbox for chemical heat pads.
Adventure Travel 5/07-6/07 Never Summer
Creature Comforts a Long Way From Home
The jacket-style nautilus hood is snug and the neck and zip baffles are thick. The whole thing feels soft, lofts beautifully and features include a heat packet pocket at the toes, a stash pocket and hang hooks. It’s easy to navigate in the dark with easy access draw-cords and snag-free zippers. Could get smaller with a compressor sack but it’s a big bag for cold trips.
Explore May 2010 Never Summer
Best Gear 2010
This is a mummy masterpiece. It feels roomy for a mummy bag, yet it packs down relatively small. And it’s true to its warmth rating. We were comfortable at -15°C sleeping on snow thanks to the 600-fill down, the baffles around the neck and along the heavy-duty zipper, and the hood that cinches smoothly. The outer shell is made from Marmot’s Membrain Strata, a superlight, waterproof and breathable material that cuts weight and keeps condensation at bay. Paired with a liner or bivy sack, the Never Summer has the power to handle most winter-camping trips.
www.skinet.com 9/10 Never Summer
Gear of the Week
If you go camping in the fall of into the winter, you’ll need a bag that’s warm and protective. This bag does the trick.
Although Labor Day generally marks the last camping weekend of the summer, there’s still plenty of time to sleep outdoors. The nights are getting a little chillier, though, and the high country is starting to see a few dustings of snow. It you do pack up the car and head to the mountains to camp, you’ll need a bag that’s warm and can withstand the elements. The Marmot Never Summer MemBrain is a zero-degree bag that works well for chilly fall nights and will keep you warm winter camping too. With 600+ fill down, this waterproof, breathable bag features a draft-preventing collar and a pocket at your feet to stash heat packs, should you need them. It also comes in regular and long lengths – perfect for tall people like me. - Sally Francklyn
Curly's Clips - Marmot Down
Marmot's own Curly Cervone and Randy Verniers explain why Marmot Down is the best on the market.
Curly's Clips - Marmot Down vs Synthetic Insulation
Marmot's own Curly Cervone and Randy Verniers discuss the differences between down and synthetic insulation, explaining how each works and identifying when you may want to choose one over the other.
Curly's Clips - Caring for Marmot Sleeping Bags
Marmot's own Curly Cervone and Brian Rashap demonstrate how to properly care for you Marmot sleeping bag.
Curly's Clips - EN Testing
Marmot's own Curly Cervone and Randy Verniers explain EN Testing on sleeping bags and how it can help you as you shop for the perfect bag in this edition of Curly's Clips.
Size Chart
| 4'11"-5'2" | 5'2"-5'6" | 5'6"-5'10" | 5'10"-6'2" | 6'2"-6'6" | |
| 90-110 lbs | XS | S | |||
| 110-135 lbs | XS | S | M | ||
| 135-160 lbs | S-M | M | M-L | ||
| 160-195 lbs | M-L | L | L-XL | ||
| 195-230 lbs | L | L-XL | XL-XXL | ||
| 230-265 lbs | XL-XXL | XXL-XXXL |
Sizing by Body Measurements
| XS | S | M | L | XL | XXL | XXXL | |
| Parkas/Jackets/Sweaters/Tops (Unisex) | |||||||
| Chest | 33-35 | 36-38 | 39-41 | 42-45 | 46-49 | 50-53 | 54-57 |
| Neck | 13.5-14 | 14.5-15 | 15.5-16 | 16.5-17 | 17.5-18 | 18.5-19 | 19.5-20 |
| Sleeve | 30-31 | 32-33 | 34-35 | 35-36 | 36-37 | 37-38 | 37-38 |
| Pants/Bibs (Unisex) | |||||||
| Waist | 26-28 | 28-30 | 31-33 | 34-36 | 37-39 | 40-42 | 44 |
| Hip | 36-38 | 38-40 | 40-42 | 43-45 | 46-48 | 50-52 | 56 |
| Inseam (reg) | 28 | 29.5 | 31 | 32.5 | 33 | 33.5 | 34.5 |
| Inseam (short) | 26 | 27.5 | 29 | 30.5 | 31 | 31.5 | 32.5 |
| Inseam (long) | 30 | 31.5 | 33 | 34.5 | 35 | 35.5 | 36.5 |
| Gloves (Unisex) | |||||||
| Girth | 6.5-7 | 7-7.5 | 8-8.5 | 9-9.5 | 10-10.5 | ||
| Parkas/Jackets/Sweaters/Tops (Women's) | |||||||
| Size | 4-6 | 6-8 | 8-10 | 12-14 | 14-16 | ||
| Bust | 30-32 | 32-34 | 35-37 | 38-40 | 41-43 | ||
| Sleeve | 29-30 | 30-31 | 32-33 | 34-35 | 36-37 | ||
| Pants/Bibs (Women's) | |||||||
| Size | 4-6 | 6-8 | 8-10 | 12-14 | 14-16 | ||
| Waist | 22-24 | 24-26 | 27-29 | 30-32 | 33-35 | ||
| Hip | 33-35 | 35-37 | 38-40 | 41-43 | 44-46 | ||
| Inseam (reg) | 27.5 | 28.5 | 30 | 31.5 | 32 | ||
| Inseam (short) | 25.5 | 26.5 | 28 | 29.5 | 30 | ||
| Inseam (long) | 29.5 | 30.5 | 32 | 33.5 | 34 | ||
| Gloves (Women's) | |||||||
| Girth | 6-6.5 | 6.5-7 | 7.5-8 | 8.5-9 | |||
Kid's Sizing (boys & girls)
| XS | S | M | L | XL | |
| Age | 4-5 | 6-7 | 8-9 | 10-12 | 13-15 |
| Chest | 24-26 | 26-28 | 28-30 | 30-32 | 32-34 |
| Waist | 19-21 | 21-23 | 23-25 | 25-27 | 27-29 |
| Hip | 24-26 | 26-28 | 28-30 | 30-32 | 32-34 |
| Inseam | 17-18 | 19-20 | 21-22 | 23-25 | 26-28 |
| Sleeve | 22-24 | 24-25 | 25-26 | 26-28 | 28-30 |
| Height (in.) | 36-42 | 42-48 | 48-54 | 54-60 | 60-65 |
| Weight (lbs.) | 35-42 | 42-50 | 50-60 | 70-90 | 90-115 |
Garment Sizing Information
The charts above will help you select the proper size.
If you have questions, please call us.
Care Instructions
Marmot does not recommend dry cleaning for any of our products. Gore-Tex® fabric products, MemBrain® fabric products, down insulated products, and fleece are all machine washable. You should use a commercial front loading machine and follow the care instructions.










Reviews and comments
on 2/26/10.
What product would you recommend for hand-washing the Never Summer down bag? Also, do you recommend applying a spray on DWR?
on 5/13/10.
I love this bag! I have used it in temperatures ranging from -20 to +40 degrees. I have never been cold in this bag and never got too warm. I compared a lot of bags and feel for a down bag, rated at 0 degrees you cant beat the value and quality. Highly recommended.
on 5/13/10.
I love this bag. I have used it in temperatures ranging from -20 to +40 degrees. I have never been to cold or too warm. I compared a lot of bags and for a 0 degree, down bag you cant beat the vaule and quality. Highly recommended.
on 5/25/10.
Hi, I just bought the Never Summer sleeping bag (Regular/Bonfire), but it turns that it's quite big for my body size. Do you have small (S) size, so i can exchange it? Besides the misjudged size, everything else is great about it! Thanks!
on 6/23/10.
I've had this bag for, I don't know, maybe eight or ten years. Comfortable in the single digits and I sleep cold. I don't think that I'll ever need another bag. Sorry Marmot. :(
on 9/6/10.
This is my first Marmot bag. I bought this bag after a camping trip where I used a North Face 20 degree synthetic bag and froze my butt off. Let me tell you, if you're camping or backpacking, this one will definately keep you toasty on cold nights. Highly recommended.
on 9/26/10.
Do you know the compressed size of this bag?
on 1/25/11.
I have fit this into a small Granite Gear stuff sack. It was not the easiest thing to do in my life and took a bit of stuffing but it fit. I would suggest a medium or possible a large stuff sack for this.
It comes with a stuff sack, however it is pretty bulky and can be compressed to a much smaller size.
Just remember not to keep it compressed for to much time, the down will stay 'springy' for only so long. The more times that you compress the less the down 'springs' back.
hope this helps.
on 11/26/10.
Had this bag for two years now, been from -10 to 75. obviously doesnt do that great in warm weather but easy fix just un zip. did great in cold weather, i have never been cold or uncomfortable. Zipper hasnt stuck yet and is easy to use when bag is fully zipped from the inside.
on 11/29/10.
What product would you recommend for
sleep during an expedition to aconcagua summit by normal route in january? Is Neversummer a good option?
on 2/23/11.
I used Marmot's -40 Gore-Tex covered bag to climb Aconcagua in January and I can tell you it took every degree. Worked great, but even inside a bomber tent and behind a rock wall with every little hole filled up, it can get mighty cold with those Pacific winds hitting the Andes full blast from Japan. Warmed up a lot during the day, but there were a couple nights I realized that I had the right bag and even having a -20 probably wouldn't have been a good idea. Spring for the -40 and sleep well every night. You'll need it!
on 11/30/10.
A great sleeping bag, sleep like a baby at -20c in thin merino-wool underwear and this bag. Many straps to stop air from exiting the bag, plenty of room in the bottom for socks and warm water bottles.
on 12/4/10.
Never summer for aconcagua expadition in january is it a good option?
on 12/18/10.
I bought this bag a month ago, went for an overnight trip, up here in the Yukon. Daytime temps about -25 C, at night, a frigid -32 C. The bag is rated at -18 C, but my core was warm. granted I slept in layers, but still, never got cold, until I got out, that it is! Great bag, thanks Marmot.
on 11/5/11.
Used this in the backcountry in Alaska for two months. Woke up sweating in the bag while sleeping on a glacier in freezing temps. Buy a compression sack to get it real small for packing. Last bag I'll ever need, best bag I'll ever own.
on 1/15/12.
went backpacking up delaware water gap in 15 degree weather with my never summer bag never got cold was toasty warm. would go down to o degree's no problem. thanks marmot!
on 1/20/12.
This is a great Sleeping Bag! Great warmth and incredible loft. You can see the Marmot quality in everything from the double zipper to the draft tubes. Thanks Marmot!
p.s. In the Never Summer description Emminent should be spelled Imminent.
on 1/20/12.
Thanks for the great review! And for catching the typo! That would be some fancy weather ...
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