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The Kelty Cosmic 40 is a three-season mummy bag filled with synthetic insulation. It weighs about 2 pounds and packs down small, which makes it one of the lighter synthetic bags in its class. The comfort rating is 37°F and the lower limit is 27°F, so it suits mild nights from late spring through early fall. Reviewers tend to like it as a first backpacking bag or a warm-weather bag for weight-conscious hikers, and it competes with other synthetic mummies on weight rather than on cold-weather warmth.
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Lowest price we've seen: $89.99 on Nov 13 at Dick's Sporting Goods. Tracked across 1 store since Nov 13.
Owners describe the Cosmic 40 as a solid, light three-season bag for mild nights. Most praise its weight and packability for a synthetic bag, while some say the temperature rating runs optimistic and the mummy cut is snug.
The Kelty Cosmic 40 is a mummy-shaped, 3-season sleeping bag for men and women. It has a nylon outer and synthetic fill, with 24 oz of fill in total.
The bag is 77.953 in long and 30.906 in wide. It fits a body length of up to 72.047 in and weighs 2 lb. Its comfort temperature is 37°F, and its lower limit is 27°F.
