Quilted mattress protector with a waterproof PU backing 15" box depth to fit around most mattresses Superking (183cm x 198cm) 100% cotton 200 count 100% cotton percale fabric with a PU backing. Anti allergy treatment has been incorporated. 120gsm polyester filling Our Superior luxury waterproof mattress protectors have anti allergy protection. With our generous 120gsm filling, this help..