Packing a lot of heat into a light package, the Marmot Helium 15 down sleeping bag is built for 3-season backpacking and mountaineering treks. It's great for cold sleepers in much warmer temps, too.
Fill
800-fill-power goose down
Weight
Short: 2 lbs. 0.5 oz.
Regular: 2 lbs. 2.7 oz.
Long: 2 lbs. 6 oz.
Temperature Rating (F)
15 degrees (F)
- Certified 800-fill-power goose down features ExpeDRY for quicker drying
- Main zipper with antisnag slider and fold-down second zipper provides added ventilation and easy access
- Anatomically designed footbox with wraparound construction increases warmth
- Smooth, curved baffles reduce down shifting
- ISO tested for reliable temperature rating
- Stuff sack and storage sack included
Imported.
Temperature ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth, since many different factors contribute to your comfort while you sleep. Backpacking bags are typically rated for temperature according to an independent testing protocol—currently International Organization for Standardization (ISO) 23537, though some older items followed European Norm (EN) 13537. Testing is based on a person wearing one base layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38.
Each bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
View all Marmot Backpacking Sleeping BagsEach bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
| Best Use | Backpacking |
|---|---|
| Tested Lower Limit | 16 degrees (F) - ISO |
| Tested Comfort | 27 degrees (F) - ISO |
| Temperature Rating (F) | 15 degrees (F) |
| Temperature Rating (C) | -9.44 degrees (C) |
| Weight | Short: 2 lbs. 0.5 oz. Regular: 2 lbs. 2.7 oz. Long: 2 lbs. 6 oz. |
| Shell | Nylon ripstop |
| Zipper Location | Left |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 800-fill-power goose down |
| Fill Weight | 1 lb. 2 oz. |
| Sleeping Capacity | 1-person |
| Lining | Nylon plain weave |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | Short: 66 inches Regular: 72 inches Long: 78 inches |
| Shoulder Girth (in.) | Short: 58 inches Regular: 61 inches Long: 63 inches |
| Hip Girth (in.) | Short: 54.3 inches Regular: 55.9 inches Long: 57.9 inches |
| Stuff Sack Size | 7.1 x 14.2 inches |
| Stuff Sack Volume | 9.2 liters |
| Gender | Unisex |