These pillow protectors help prolong the life of your pillows. They have a polyester and cotton cover, 100% polypropylene backing and 100% polyester filling. Our range of mattress protectors are designed to help increase the life of your mattress. These king mattress protectors are made from polyester and cotton, have a 100% polypropylene backing and skirt with a 100% polyester filling. For your convenience, the pillow and mattress protectors are machine washable and can be tumble dried.