Get Schooled in the Geometry of Comfort The Kelty Women's Cosmic Ultra 20 is the ultimate in a lightweight mummy. We've taken our top-selling Cosmic Bag and added a women's specific 800 fill DriDown version, with all the perks too. The new trapezoidal baffle construction improves is ideal for retaining heat-and it's just one of the reasons Cosmic is still our favorite three-season superstar. We also love the natural-fit foot box for happier feet, and a PFC-free water-repellent coating for a healthier environment. What makes it a women's bag? It's designed for and tested to women's specific ISO standards. Studies show that women "sleep colder" than men. So, in addition to narrower shoulders, wider hips and a shorter torso, our women's bags have extra insulation in the upper body and footbox. Features Innovative trapezoidal baffle construction = thermal efficiency Premium lightweight 800 fill DriDown Environmental and health friendly C0 and PFC-free DWR fabrics Zippered internal stash pocket for headlamp, cell phone or actual... stash Buttery-soft and durable 20D Nylon shell and liner Zipper draft tube keeps warm air in while anti-snag zipper makes it easy to get in and out Natural fit spacious footbox = more room to wiggle your toes Comes with stuff sack for quick departures Materials Liner: 20D 400T Nylon Shell: 20D 400T Nylon Fill: 800DP DriDown The state of Utah requires online retailers to provide product law labels online. Click the link to view the label. Specs Temperature Rating: 20.0degF / -7.0degC ISO Comfort Rating: 25.0degF / -4.0degC ISO Limit Rating: 13.0degF / -10.0degC ISO Extreme Rating: -21.0degF / -30.0degC Bag Shape: Mummy Weight: 2.89 lbs / 1.31 kg Fill Weight: 24.69 oz / 700.0 g Fits To: 67.72" / 172.0 cm Length: 74.02" / 188.0 cm Shoulder Circumference: 57.87" / 147.0 cm Hip Circumference: 57.87" / 147.0 cm Foot Circumference: 38.19" / 97.0 cm Stuff Sack Size: 8 x 13 in / 20 x 33 cm | Kelty Women's Cosmic Ultra 20 Sleeping Bag