Polyester，Nylon

【Ultra Comfort & Durable】Outer material: Nylon (Waterproof and Durable)， Lining:100% Polyester (Breathable and skin-friendly)， Premium Polyester keeps the temperature from 55 to 60℉ and provides a ultra-comfort sleep environment to people.

【Professional Design】Our sleeping bag size is 86"" L x 30"" W， which can be used by both adults and children. In order to ensure your warmth， we have specially designed gourd-shaped stitches to prevent the sleeping bag from sliding， allowing you to sleep more peacefully and comfortably.

【Compact & Lightweight Easy To Carry】Unlike down sleeping bags， Our envelope sleeping bag is easy to roll up into the carrying sack and it can be compressed down to just 11"" in height and 1.45lbs in weight. It's ideal for backpacking enthusiasts.

【MULTIPURPOSE VERSATILITY】You can use our warm weather sleeping bag without sleeping bag liner in multiple weather conditions. It's a perfect sleeping bag for Outdoor camping trips， Boy Scouts or mountain hiking，also works as camping comforter

Lightweight Backpacking Sleeping Bag for Adults Boys and Girls， Cold Weather Kids Sleeping Bag for 3 Seasons Hiking & Camping Brown