How to Choose Sleeping Bags for Backpacking
Marmot Always Summer Sleeping Bag
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Get luxurious quiltlike comfort while backpacking or camping with the Marmot Always Summer sleeping bag. It's filled with highly packable, 650-fill-power down for just-right warmth on cool nights.
Shop similar productsKey Details
Fill
650-fill-power down
Compressed Volume
4.7 liters
Temperature Rating (F)
40 degrees (F)
- Certified 650-fill-power down is treated with Down Defender to improve water resistance in wet conditions
- Dual side zippers for easy access
- Extended zipper flaps provide blanket-like coverage when unzipped
- Footbox zipper opens when you want extra space and closes when you want extra warmth
- Recycled shell and lining fabrics
- 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) |
| Shell | Recycled ripstop nylon |
| Zipper Location | Left/Right |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 650-fill-power down |
| Sleeping Capacity | 1-person |
| Lining | Recycled nylon taffeta |
| Sleeping Bag Shape | Mummy |
| Compressed Volume | 4.7 liters |
| Gender | Unisex |
| Sustainability | Contains recycled materials Down certified to the Responsible Down Standard (RDS) |
