Remember the trapezoid from high school geometry? Turns out, this funky ol' shape is ideal for helping sleeping bags retain heat. Kelty's trapezoidal baffle construction is just one of the reasons the Cosmic Down is still the favorite three-season superstar. You'll also love the expanded natural-fit footbox for happier feet, zippered stash pocket and fully recycled fabrics and PFAS-free DWR treatment. The Cosmic Down is the total package.

Trapezoidal baffle construction provides enhanced thermal efficiency
Lofty, lightweight and warm 550 Fill Down
Buttery-soft and durable, fully-recycled shell and liner fabrics with PFAS-free DWR
Zippered internal stash pocket keeps your favorite devices close at hand
Full draft tube and collar retain heat and enhance comfort
Quad-stitch anti-snag zipper makes getting in and out easy
Dual locking sliders for venting versatility
Expanded, natural fit footbox = more room to wiggle your toes
Stuff sack included, for quick and easy departures
Insulation: 550 Fill Down
Fabric Primary/Body: Recycled 20D Nylon Taffeta
Fabric Secondary: Recycled 50D Polyester Taffeta
Temperature Rating: 20°F / -7°C
Fits to: 5' 6" (Short), 6' 0" (Regular), 6' 6" (Long)
Fill weight: 14.6 oz (Short), 16.4 oz (Regular), 18.8 oz (Long)
Stuff Sack Size: 7" x 13" (Short), 8" x 13" (Regular), 8" x 14" (Long)
Length: 72 in (Short), 78 in (Regular), 84 in (Long)
Shoulder Circumference: 58 in (Short), 62 in (Regular), 64 in (Long)
Hip Circumference: 56 in (Short), 58 in (Regular), 60 in (Long)
Foot Circumference: 43 in (Short), 46 in (Regular), 52 in (Long)
Weight: 2 lb. 3 oz (Short), 2 lb. 7 oz (Regular), 2 lb 11 oz (Long)