Kelty Cosmic 0 Degree 550 Down Sleeping Bag

A proven classic built to keep you warm. The Cosmic Down Sleeping Bag has earned its reputation as a three-season favorite thanks to smart design, reliable warmth, and durable, eco-conscious materials. Its trapezoidal baffle construction-yes, that trapezoid from geometry class-helps trap heat more efficiently, keeping you warmer when temperatures drop. Insulated with lightweight 550-fill down and wrapped in fully recycled fabrics with a PFAS-free DWR treatment, the Cosmic Down balances warmth, packability, and sustainability. An expanded natural-fit footbox gives your feet room to relax, while a full draft tube and collar seal in heat for added comfort. From campsite nights to shoulder-season adventures, this sleeping bag delivers dependable performance with thoughtful details that make a real difference. Best For Three-season camping and backpacking Cold-weather shoulder seasons Campers who want warmth without a mummy-tight fit Key Features Trapezoidal Baffle Construction: Improves thermal efficiency and heat retention. 550 Fill Down Insulation: Lofty, lightweight, and warm. Recycled Fabrics: Fully recycled shell and liner with PFAS-free DWR for water resistance. Heat-Retaining Design: Full draft tube and draft collar help prevent heat loss. Anti-Snag Zipper: Quad-stitch construction makes entry and exit smooth and easy. Ventilation Control: Dual locking sliders allow customizable venting. Natural-Fit Footbox: Expanded shape provides more room to move and sleep comfortably. Internal Stash Pocket: Zippered pocket keeps small essentials close. Stuff Sack Included: Makes packing up quick and easy. Construction & Materials Insulation: 550-fill down Shell Fabric: Recycled 20D nylon taffeta Liner Fabric: Recycled 50D polyester taffeta Specifications (All Sizes) Temperature Rating: 0AdegF / -10AdegC Tested at 5AdegF / -15AdegC Bag Shape: Semi-rectangular Size & Fit Regular Fits up to: 6&';0" / 183 cm Weight: 4.34 lb / 1.93 kg Fill Weight: 39.5 oz / 1120 g Length: 78 in / 199 cm Shoulder Circumference: 62 in / 158 cm Hip Circumference: 57 in / 147 cm Foot Circumference: 46 in / 117 cm Stuff Sack Size: 10" x 19" / 25 x 48 cm Long Fits up to: 6&';6" / 198 cm Weight: 4.5 lb / 2.04 kg Fill Weight: 41.6 oz / 1178 g Length: 84 in / 214 cm Shoulder Circumference: 64 in / 163 cm Hip Circumference: 60 in / 152 cm Foot Circumference: 52 in / 131 cm Stuff Sack Size: 10" x 18" / 25 x 48 cm