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Marmot Helium 15 Degree (2023) Sleeping Bag

Purchase Helium 15 Degree (2023)

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The ultra-lightweight, compressible Marmot Helium 15 Degree sleeping bag employs high-performance water-resistant down insulation and premium sustainable fabrication to deliver top notch 3-season backpacking reliability.


  • Water-resistant down insulation ensures all-condition performance: The bag utilizes certified 800+ fill power goose down with ExpeDRY to grant an excellent warmth-to-weight ratio with weather-resistance to keep on insulating even when damp or wet. Recycled Pertex Quantum shell fabric increases weather-resistance.
  • Thermally efficient design features: The bag's mummy shape helps to reduce weight and eliminate cold spots and curved baffles reduce down shifting to further ensure consistent warmth. An anatomically designed footbox increases warmth in a common area of heat loss.
  • Unique zipper configuration adds versatility: The main zipper running down the side of the bag has a smooth-gliding anti-snag slider and a second zipper segment on the other side allows the front of the bag to fold down for easier access and for venting on warmer nights.
  • ISO tested to confirm the bag's temperature rating: Marmot took all the necessary steps to test the Helium so backpackers can be confident in its 15 degree Fahrenheit temperature rating.

Sizing and fit
The Helium 15 Degree bag is available in Short (fits up to 5' 6"), Regular fits up to 6' 0") and Long (fits up to 6' 6") size options. A stuff sack and storage sack are both included.

Technical Specs

Best Use
Backpacking, Camping
Fill Material
800-fill-power goose down with eco-friendly ExpeDRY water-repellent finish
Fits To Girth
Short: 58"
Regular: 61"
Long: 63"
(Shoulder girth)
Fits To Length
Short: 5' 6"
Regular: 6'
Long: 6' 6"
Temperature Rating
15 degrees F
Insulation Type
Item Weight
Short: 2 lbs 0.5 oz
Regular: 2 lbs 2.7 oz
Long: 2 lbs 6 oz
Storage bag and stuff sack included
Limited Lifetime
Packed Size
14.2" x 7.1"
Shell Material
Pertex Quantum 100% Recycled Nylon Ripstop
Liner Material
100% Recycled Nylon Plain weave

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