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 All Sizes Temperature Rating: 5AdegF / -15AdegC Bag Shape: Semi-Rectangular Regular Fits to: 6&'; 0" / 183 cm Weight: 4.34 lb. / 1.93 kg Fill weight: 39.5 oz. / 1120 g Stuff Sack Size: 10" x 19" / 25 x 48 cm Length: 78 in / 199 cm Shoulder Circumference: 62 in / 158 cm Hip Circumference: 57 in / 147 cm Foot Circumference: 46 in / 117 cm Long Fits to: 6&'; 6" / 198 cm Weight: 4.5 lb. / 2.04 kg Fill weight: 41.6 oz. / 1178 g Stuff Sack Size: 10" x 18" / 25 x 48 cm Length: 84 in / 214 cm Shoulder Circumference: 64 in / 163 cm Hip Circumference: 60 in / 152 cm Foot Circumference: 52 in / 131 cm Insulation:550 Fill Down Fabric Primary/Body: Recycled 20D Nylon Taffeta Fabric Secondary: Recycled 50D Polyester Taffeta