1.Nylon

2.XL Spacious Sleeping Bag for Big and Tall:We designed this extra large sleeping bag specifically for adults seeking spacious comfort, measuring 82.6 x 31.5 inches—approximately 10% larger than traditional camping sleeping bags.Stretch freely and adjust your sleeping position inside for ultimate comfort, making it ideal for tall and larger builds or pepole who like to turn over during sleep,even for camping family which need camping with kids in one sleeping bag without feeling cramped.

3.DURABLE MATERIALS: 100% polyester shell  provides warmth and comfort on cold nights

4.LIGHTWEIGHT AND COMPACT: Specifically engineered to compress tightly for easy packing, but puffs up nicely when in use. Amazingly ultra-lightweight and provides superior warmth. Easy to fold and includes a travel-friendly compression sack with a drawstring and straps for powerful compression.