Helium Sleeping Bag: 15F Down
Size:
Quantity
Why We Like The Marmot Helium Sleeping Bag
The Marmot Helium Sleeping Bag dials up the warmth while dialing down the weight, thanks to its use of premium materials. That starts with 800-fill goose down that's been treated with Down Defender to make it more weather resistant and to protect its loft for long-term insulation. We also like the Pertex Quantum fabric for a light but rip-resistant finish that helps keep the Helium's weight hovering around two pounds. The mummy shape also sheds a few grams while holding in more heat, along with the insulated draft tube and Nautilus Multi-Baffle Hood. This bag packs down small and doesn't weigh us down when we're backpacking or mountaineering.
Details
- Light and lofty down sleeping bag
- Down offers the most warmth for the least weight
- DWR coating helps shed light moisture and stains
- Smooth-curved baffles reduce down shifting
- Full Length Locking YKK Two Way Zipper with Zip-Guard Slider
- Internal stash pocket to keep small items warm at night
- Stuffs down to 14.2 x 7.1in (7 liters)
- Includes storage sack and stuff sack for convenience
- Item #MARZ9X3
- Material
- [face fabric] Pertex Micolight (20D nylon), [lining] 30D nylon, DWR coating
- Insulation
- 800-fill down
- Shape
- mummy
- Zipper
- left-hand
- Shoulder Circumference
- 61in
- Hip Circumference
- 55.9in
- Foot Circumference
- 44.5in
- Draft Tube
- yes
- Pockets
- 1 stash
- Pad Retainer
- none
- Venting
- 2nd zipper
- Fill Weight
- not available
- Degree
- 15F
- European Norm/ISO Comfort Rating
- 22.6F
- European Norm/ISO Lower Limit Rating
- 10.4F
- Storage Sack
- included
- Stuff Sack
- included
- Stuff Size
- 14.2 x 7.1in (7L)
- Claimed Weight
- 2lb 1oz
- Activity
- backpacking, mountaineering, camping
- Manufacturer Warranty
- lifetime
Reviews
Q&A
What do you think about this product?
Overall Rating
5 based on 8 ratings
Review Summary
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Selecting an option will reload the available reviews on the pageAugust 19, 2025
Love it
[This review was collected as part of a promotion.] Great bag, light weight, keeps me warm, haved used for years from Mount Whitney to Yosemite Would recommend it to anyone
Originally reviewed on marmot.com
August 19, 2025
Dyno-Mite
[This review was collected as part of a promotion.] Kept me warm and cozy on so many levels. To car camping in the ADK in the dead of winter to winter camping near Stowe. Great investment. Highly recommend
Originally reviewed on marmot.com
August 4, 2025
The New Bag
[This review was collected as part of a promotion.] Lots of good to say about this bag. Very comfortable and packs down plenty. Easy to use zipper and adjustments around the top. Have yet to put it to the test outdoors, but look forward to many cozy nights.
Originally reviewed on marmot.com
July 31, 2025
Awesome Starter and Finisher
[This review was collected as part of a promotion.] Loved snuggling into this Absolute beast I cannot state enough how clutch this came in
Originally reviewed on marmot.com
July 30, 2025
Comfy in the cold
[This review was collected as part of a promotion.] Warm, lightweight, and compressible, this 15° sleeping bag is ideal for chilly nights. The insulation traps heat effectively, and the zipper doesn't snag. Perfect for backpacking or camping when temperatures drop but you still want packability and comfort.
Originally reviewed on marmot.com
January 4, 2025
Great sleeping bag
[This review was collected as part of a promotion.] Bought this as a gift for my son, he loves it and said it. He says it will be perfect for his backpacking trips and/or camping. Is lightweight. He is 6'5" and he says it fits him well.
Originally reviewed on marmot.com
June 12, 2024
Excellent night of sleep
[This review was collected as part of a promotion.] Soft as butter, toasty warm, light as a feather. This is a go to back for cold backcountry.
Originally reviewed on marmot.com
September 29, 2023
Very light and very warm!
[This review was collected as part of a promotion.] Purchased this bag for shoulder season backpacking in Colorado. I used it for the firsttime last weekend. Night time temps got down to around 28F and this bag kept me toasty and feeling warm all through the night. It is incredibly light weight considering the fill and has a nice feel to the material. The only thing I would change is to have the secondary foot zipper extend further into the foot box area. It doesn't expel heat fast enough if you run warm.
Originally reviewed on marmot.com
Do you have a question about this product?
February 23, 2025
Is there a women's bag that is compatible with the Helium Down 15° Sleeping Bag?
Originally reviewed on marmot.com
April 16, 2024
What is the length and maximum height of this bag?
Originally reviewed on marmot.com
December 8, 2023
What size compression sack would be best for this model?
Originally reviewed on marmot.com
November 9, 2023
What is the average down fill weight for a regular size?
Originally reviewed on marmot.com
October 31, 2023
I see this bag comes with a stuff sack. When backpacking can I and would it harm the bag in anyway if I put it in a compression bag and can you tell me how small it will compress?
Originally reviewed on marmot.com
October 10, 2023
How small does the helium compress down to?
Originally reviewed on marmot.com
August 21, 2023
Will this bad still be offered in solid blue?
Originally reviewed on marmot.com
June 30, 2023
Hi there! Could you describe the difference between this Helium 15 and the previous (monotone) model? Is this bag also filled/finished in USA?
Originally reviewed on marmot.com
March 21, 2023
What si the leng in short and long sleepingbag? Tks
Originally reviewed on marmot.com
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