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 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.

• Comfort Rating: 21°
• Weight: 2 lbs. 6 oz. (SH); 2 lbs. 10 oz. (REG) 2 lbs. 13 oz. (LNG)
• Fits to: 5 ft. 5 in. (SH); 6 ft. (REG); 6 ft. 6 in. (LNG)
• Fill type: Down