An outdoor superstar, the Kelty Cosmo 40 down sleeping bag features cozy 550-fill-power duck down and a buttery-soft nylon shell that'll have you daydreaming about more quality time under the stars.
Fill
550-fill-power duck down
Temperature Rating (F)
40 degrees (F)
- 20-denier nylon shell fabric is durable and soft; C0- and PFC-free durable water repellent (DWR) finish sheds moisture and stains
- 550-fill-power duck down is lightweight and warm; quilt-through construction keeps insulation in place
- Handy stash pocket gives you a spot to keep your headlamp, cellphone or other small essentials close by
- Dual-slider locking zippers allow for easy ventilation
- Zipper draft tube with antisnag design makes it easy to get in and out of the bag
- Natural-fit spacious footbox gives you more room to wiggle your toes
- 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 | 40 degrees (F) - ISO |
| Tested Comfort | 48 degrees (F) - ISO |
| Temperature Rating (F) | 40 degrees (F) |
| Temperature Rating (C) | 4 degrees (C) |
| Shell | 20-denier 400T nylon |
| Zipper Location | Right |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 550-fill-power duck down |
| Lining | 50-denier 300T polyester |
| Sleeping Bag Shape | Mummy |
| Gender | Unisex |