Waterproof sheet, size 100cm x 210cm, mixed cotton and polyester material. I used it for about three months just in case, but decided I didn't need it and stopped using it, so the elastic hasn't deteriorated and the condition is good. *Washed several times. - Size: 100cm x 210cm - Composition: Surface: 80% cotton, 20% polyester; Back: 100% polyurethane Thank you.