Great design, durability, incredible comfort, and soft, natural 100% silk next to your skin. Silk breathes naturally, wicking away moisture and drying more quickly than cotton. But it's also strong and durable to withstand the rigors of travel. Includes a single zippered pocket for travel documents, clear plastic insert to protect documents from moisture, and an adjustable elastic waist belt. Lifetime Guarantee. (18 x 5 1/2"; 2 oz)