How to Choose Sleeping Bags for Backpacking
Marmot Always Summer 40 Sleeping Bag - Men's
$139.73 – to $154.73Save up to 29%
Filled with highly packable, 650-fill-power down for just-right warmth on cool nights, the men's Marmot Always Summer 40° sleeping bag offers luxurious quiltlike comfort while backpacking or camping.
Key Details
Fill
650-fill-power duck down
Weight
Regular: 1 lb. 12.6 oz.
Long: 1 lb. 14.7 oz.
Temperature Rating (F)
40 degrees (F)
- Certified 650-fill-power down with Down Defender to improve water resistance in wet conditions
- Dual side half zippers for easy access
- Extended zipper flaps to provide extra blanketlike coverage when unzipped
- Footbox zipper opens when you want extra space and closes for extra warmth
- Recycled shell and lining fabrics for a sustainable choice
- Internal stash pocket
- ISO-tested for reliable temperature rating
- Stuff 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 | 37 degrees (F) - ISO |
| Tested Comfort | 46 degrees (F) - ISO |
| Temperature Rating (F) | 40 degrees (F) |
| Temperature Rating (C) | 4 degrees (C) |
| Weight | Regular: 1 lb. 12.6 oz. Long: 1 lb. 14.7 oz. |
| Shell | 20-denier 100% recycled nylon ripstop |
| Zipper Location | Left/Right |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 650-fill-power duck down |
| Fill Weight | Regular: 7.8 ounces Long: 9.9 ounces |
| Sleeping Capacity | 1-person |
| Lining | 20-denier 100% recycled nylon taffeta |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | Regular: 72 inches Long: 78 inches |
| Shoulder Girth (in.) | Regular: 64 inches Long: 65 inches |
| Hip Girth (in.) | Regular: 59.1 inches Long: 59.8 inches |
| Stuff Sack Size | Regular: 7.5 x 16.1 inches Long: 8.7 x 18.1 inches |
| Stuff Sack Volume | Regular: 25 liters Long: 36.7 liters |
| Gender | Men's |
