With an optimal ISO-tested comfort rating that teeters above or below zero, the Helium packs serious warmth in a super-packable 800-fill-power down bag designed to easily stuff into any overnight pack. A thru-hiking favorite, this high-performance bag provides lightweight warmth that’s also light on the Earth—perfect for when you're looking to maximize miles or speed in the mountains and minimize weight and space in your pack.
RDS-certified 800-fill-power goose down with quick-dry ExpeDRY treatment
Anti-snag slider on main zipper and fold-down second zipper provide added ventilation and easy access in and out of the sleeping bag
Anatomically designed footbox with wrap-around construction increases warmth
Smooth, curved baffles reduce down from shifting, increasing durability and reducing inconsistent heating inside bag
ISO-tested for reliable temperature and comfort rating
Stuff sack and storage sack included
Long length fits sleepers up to 6'6"
Style Variants
Available Colors: Arctic Navy/Dark Azure
Size Reference for Marmot 15° Sleeping Bag - Long
Available Sizes: LZ
