These Mattress & Pillow Protectors are made from 80 percent terry cloth surface and 20 percent polyester with a Polyurethane laminated backing. Soft and quiet absorbent terrycloth surface. These Mattress & Pillow Protectors are 100 percent waterproof and has a dust mite protective barrier. Snug fitting expandable knit side walls, that fit mattresses up to 20'' thick! Pillow protectors are made from the same fabric and have a zipper closure.