This Rayon from Bamboo mattress pad features a super-soft fabric to add a cloud-like surface to the bed. The pad is made from Rayon from Bamboo and polyester fabric. Its deep pockets fit up to 18-inch mattresses and it fits even deep mattresses like pillow-tops. Designed to go in the washer or dryer for simple care. This exclusive and extraordinary technology gives you the look and feel of Rayon from Bamboo only better, and makes the cover hypoallergenic and 100% washable. The expandable skirt allows the cover to fit any thicker pillow top mattress with ease.