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MarmotHelium Sleeping Bag: 15F Down

MarmotHelium Sleeping Bag: 15F Down

$411.95 - $430.95
Select a color:Cobalt Blue/Blue Night

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5 out of 5 stars
29 Reviews

Why We Like The Helium Sleeping Bag

Lighter than an imaginary cloud (and far warmer), Marmot's Helium 15-Degree Down Sleeping Bag is the perfect bag for long, chilly trips when added ounces can mean serious slowdowns. The Helium is part of Marmot's Ultralight series, which isn't quite as airy as the barely-there Ion, but it's a lot more affordable and still a killer three-season bag for backpacking, camping, and alpine missions. Pertex Microlight and nylon ripstop fabrics keep the superlight 800-fill goose down from escaping, and Marmot's Smooth-Curved baffle construction prevents the insulation from shifting around, so we're not fighting cold spots as we drift off to sleep. The Helium also sports an anatomically designed footbox and drawcord hood to keep our extremities toasty, and it uses a dual-zipper construction to let us fold down the top of the bag to sit up and increase ventilation when the night is a little warmer than expected.


  • Ultralight sleeping bag for backpacking
  • 15-degree temperature rating keeps us toasty
  • 800-fill down insulation has a high warmth-to-weight ratio
  • Pertex Microlight and nylon ripstop fabrics resist abrasions
  • DWR treatment resists light moisture
  • Anatomically designed footbox for natural foot position
  • Drawcord hood cinches down to trap heat
  • Dual zippers for easy access at any time
  • Item #MAR00TJ

Tech Specs

[face fabric] Pertex Microlight (20D nylon ripstop), DWR treatment, [lining] 30D nylon, DWR treatment
800-fill down
full-length left, right fold down
Max User Height
[regular] 6ft, [long] 6ft 6in
Shoulder Circumference
[regular] 62in, [long] 63in
Hip Circumference
[regular] 56in, [long] 58in
Foot Circumference
[regular] 44.5in, [long] 46in
Bag Length
[regular] 6 ft, [long] 6 ft 6 in
1 internal stash
Pad Retainer
Fill Weight
[regular] 20oz, [long] 22oz
15 F
European Norm/ISO Comfort Rating
Storage Sack
Stuff Sack
Stuff Size
7 x 14in
Claimed Weight
[regular] 2lb 1oz, [long] 2lb 4.5oz
backpacking, mountaineering, weekend camping
Manufacturer Warranty

Overall Rating

4.5 based on 29 ratings

Review Summary

5 Stars - 27 reviews
4 Stars - 1 reviews
3 Stars - 0 reviews
2 Stars - 1 reviews
1 Stars - 0 reviews

Fits True To Size

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Runs smallTrue to sizeRuns large

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