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.

Features

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

Materials

• Insulation: 550FP Duck Down
• Shell material: 20D 400T Nylon
• Liner material: 50D 300T Polyester