Remember the trapezoid from 10th-grade geometry? Turns out, this funky ol’ shape is ideal for helping sleeping bag baffles retain heat. The trapezoidal baffle construction improves on our best-selling Cosmic sleeping bag—and it’s just one of the reasons the Kelty Cosmic Down 0 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.

Innovative trapezoidal baffle construction = thermal efficiency
Lightweight and warm 550 fill down
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 fabric
Zipper draft tube with anti-snag zipper design makes it easy to get in and out
Dual slider for ventilation with locking zippers
Natural fit spacious footbox = more room to wiggle your toes
Comes with stuff sack for quick departures

ISO Comfort Rating: 17° / -8°C
ISO Limit Rating: 4° / -16°C
ISO Extreme Rating: -34° / -37°C
Fits to: 6' 6" / 198 cm
Weight: 4 lb. 13 oz. / 2.18 kg
Fill weight: 41.55 oz. / 1178 g
Stuffed size: 10" x 19" / 25 x 48 cm
Insulation: 550FP Duck Down
Shell material: 20D 400T Nylon
Liner material: 50D 300T Polyester
 

• Size = Long