The waterproof mattress protector was made of super soft microfiber fabric ,filled with 120g hollow cotton. Soft mattress protector supports you enjoy relaxing sleep each and every night ALL SEASONS. Our mattress protector waterproof fitted stretches up to 16in. with highly elastic skirt, protecting your mattress and pillows from sweat, urine, bedwetting. The excellent stitch crafts make this mattress pad durable and long to last for years.Protecting all sides of the mattress and fixed in place all night. No more frustration about sliding.