Kelty Cosmic Down 40ºF Sleeping Bag

Remember the trapezoid from 10th grade geometry? Turns out, that funky shape is ideal for helping sleeping bag baffles retain heat. 

Trapezoidal baffle construction improves on Kelty’s® best-selling Cosmic 20 sleeping bag – and it’s just one of the reasons the Kelty Cosmic Down 40 is still a favorite three-season superstar. Plus the natural-fit foot box makes feet happy, and a PFC-free water-repellent coating makes for a healthier environment.

• Innovative trapezoidal baffle construction provides thermal efficiency
• Lightweight and warm 550 fill down
• Buttery-soft and durable 20D nylon shell
• Environmental- and health-friendly C0 and PFC-free DWR fabrics
• Right side zipper
• Zipper draft tube with anti-snag zipper design makes it easy to get in and out
• Dual slider for ventilation with locking zippers
• Zippered internal stash pocket for headlamp, cell phone and more
• Natural fit spacious footbox provides room for toes to wiggle 
• Stuff sack included
• Regular fits up to 6′ 0″; Long fits up to 6′ 6″
• Color: Gray

ISO rating:

• Extreme rating: -15°F / -9°C
• Limit rating: 40°F / 4°C
• Comfort rating: 48°F / 9°C