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 bagand its 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

Specifications:

ISO Comfort Rating: 17F / -8C
ISO Limit Rating: 4F / -16C
ISO Extreme Rating: -34F / -37C
Temperature Rating: 20F / -7C
Bag Shape: Mummy

Regular
Fits to: 6′ 0″ / 183 cm
Weight: 4.34 lb. / 1.97 kg
Fill weight: 39.51 oz. / 1120 g
Stuff Sack Size: 10″ x 19″ / 25 x 48 cm
Length: 78 in / 198 cm
Shoulder Circumference: 62 in / 158 cm
Hip Circumference: 58 in / 147 cm
Foot Circumference: 40 in / 102 cm

Long
Fits to: 6′ 6″ / 198 cm
Weight: 4.63 lb. / 2.1 kg
Fill weight: 41.55 oz. / 1178 g
Stuff Sack Size: 10″ x 19″ / 25 x 48 cm
Length: 84 in / 213 cm
Shoulder Circumference: 64 in / 163 cm
Hip Circumference: 60 in / 152 cm
Foot Circumference: 42 in / 107 cm