Come and see our amazing products. The sleeping bag liner is made of premium polyester with a silky texture which makes it's very soft and comfortable against your skin. Unlike normal cotton fabric, easy to crinkle. This new type of fabric no crinkle, no pilling or fade, can be used for a long time.It can be used alone as a sleeping bag to keep you from dirt , or used as a liner in down sleeping bag,or as a hotel sleeping sack. Keeps you comfortable throughout the night. Available in many colors and custom logo is welcome. Pls confirm with us about the packing info, stock color and exact production time before placing your order.