How to Choose Sleeping Bags for Backpacking
Anacortes
Kelty Cosmic Synthetic 40 Sleeping Bag
$66.73Compared to $89.95*Save 25%
Stay comfortable on cool nights in the backcountry with this Kelty sleeping bag. It has a mummy shape with a spacious footbox. Cirroloft synthetic insulation is lightweight, warm and compressible.
Key Details
Fill
CirroLoft synthetic
Weight
2 lbs. 6 oz.
Temperature Rating (F)
40 degrees (F)
- Soft-as-silk nylon taffeta fabric means you'll be thinking less about weary hiker feet and daydreaming about more quality time in the outdoors
- Soft-touch and compressible Cirroloft synthetic insulation
- Natural-fit, spacious footbox provides more room to wiggle your toes
- Handy stash pocket for your headlamp or cellphone
- Buttery-soft and durable nylon shell with PFAS-free durable water repellent (DWR)
- Compression stuff 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 the Kelty Cosmic Product LineView all Kelty 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 | 27 degrees (F) - ISO |
| Tested Comfort | 37 degrees (F) - ISO |
| Temperature Rating (F) | 40 degrees (F) |
| Temperature Rating (C) | 4 degrees (C) |
| Weight | 2 lbs. 6 oz. |
| Shell | 20-denier nylon taffeta |
| Zipper Location | Right |
| Insulation Type | Synthetic |
| Fill | CirroLoft synthetic |
| Fill Weight | 1 lb. 8 oz. |
| Sleeping Capacity | 1-person |
| Lining | 50-denier polyester taffeta |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | 72 inches |
| Shoulder Girth (in.) | 62 inches |
| Hip Girth (in.) | 58 inches |
| Stuff Sack Size | 8.5 x 15 inches |
| Stuff Sack Volume | Unavailable |
| Compressed Volume | Unavailable |
| Gender | Unisex |
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