nylon Imported 0 Degree Temp Rating, Long Size: Fits sleepers up to 6ft 6in, fill weight 60oz, total weight 4lbs 11oz, stuff size (non-compressed) 17x11 inches. Packability: Integrated compression stuff sack, coupled with the premium packability of the synthetic fill allow the Cosmic synthetic to reach minimalist standards of backpacking gear. Trail weight varies by temp rating, from 2lbs 6oz to 4lbs 11oz. Insulation: Cirroloft synthetic insulation provides reliable warmth in cold and damp conditions, maintains loft for even coverage with no cold spots. Temperature ratings from 0 degrees to 40 degrees, to ensure your time on the trail is comfortable. Tailored Fit: Natural fit spacious footbox gives more room to wiggle your toes, and length options range to fit sleepers 5’8” to 6’6”. A handy stash pocket on the exterior of the bag for your overnight goodies and essentials in the tent. Kelty Craftsmanship: Kelty is synonymous with quality in the outdoor community. Kelty gear is built for play, and built to last. The Cosmic Synthetic bag is ready to be put through the ringer on the trail, campground, and everywhere in between. The Cosmic Synthetic 0°F Sleeping Bag proves that staying warm under the stars doesn't have to break the bank. With CirroLoft ECO insulation made from 100% recycled fibers, this mummy bag delivers lightweight, compressible warmth that's easy to pack and perfect for even wintry adventures. Its durable nylon shell features a PFAS-free DWR finish for added weather defense, while the silky taffeta liner ensures comfort after a long day on the trail. Designed for both warmth and functionality, the bag's contoured hood, full draft collar, and offset quilt construction work together to trap heat and prevent cold spots.