Remember the trapezoid from high school geometry? Turns out, this funky ol' shape is ideal for helping sleeping bags retain heat. Our trapezoidal baffle construction is just one of the reasons the Cosmic Down is still our favorite three-season superstar. We 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

Temperature Rating: 20°F / -7°C
Bag Shape: Semi-Rectangular

Regular

Fits to: 6' 0" / 183 cm
Weight: 2 lb. 7 oz.
Fill weight: 16.4 oz. / 464 g
Stuff Sack Size: 8" x 13" / 20 x 33 cm
Length: 78 in / 199 cm
Shoulder Circumference: 62 in / 158 cm
Hip Circumference: 58 in / 147 cm
Foot Circumference: 46 in / 117 cm

Long

Fits to: 6' 6" / 198 cm
Weight: 2 lb 11 oz
Fill weight: 18.8 oz. / 533 g
Stuff Sack Size: 8" x 14" / 20 x 36 cm
Length: 84 in / 214 cm
Shoulder Circumference: 64 in / 163 cm
Hip Circumference: 60 in / 152 cm
Foot Circumference: 52 in / 131 cm

Material

Insulation: 550 Fill Down
Fabric Primary/Body: Recycled 20D Nylon Taffeta
Fabric Secondary: Recycled 50D Polyester Taffeta

Kelty Cosmic 20 Degree 550 Down Sleeping Bag