Pack the heat not the bulk with the 3-season Marmot Helium 15 men's sleeping bag. With water-resistant down, it's built to handle wet springs all the way through chilly falls.
Fill
800-fill-power goose down
Weight
2 lbs. 4.7 oz.
Temperature Rating (F)
10.4 degrees (F)
- Insulated with certified 800-fill-power goose down with Down Defender to improve water resistance in wet conditions
- Nautilus multibaffle hood limits heat loss
- Main zipper has an antisnag slider for easy access and a second fold-down zipper for added ventilation
- Smooth, curved baffles help keep down from shifting
- Anatomically designed footbox with wraparound construction increases warmth
- EN tested for reliable temperature rating
- Closeout
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 | 10.4 degrees (F) - EN |
| Tested Comfort | 22.6 degrees (F) - EN |
| Temperature Rating (F) | 10.4 degrees (F) |
| Temperature Rating (C) | -12 degrees (C) |
| Weight | 2 lbs. 4.7 oz. |
| Shell | Pertex Quantum ripstop nylon |
| Zipper Location | Left |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 800-fill-power goose down |
| Fill Weight | 1 lb. 5.9 oz. |
| Lining | Nylon plain weave |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | 78 inches |
| Shoulder Girth (in.) | 63 inches |
| Hip Girth (in.) | 57.9 inches |
| Stuff Sack Size | 7.1 x 14.2 inches |
| Stuff Sack Volume | 9.2 liters |
| Gender | Men's |