Cover: 100% cotton, zippered for removal, washable & dryable. Filler: Thick convoluted foam. Hand washable. Sizes: Large 30"x40", X-Large 34"x54" Washing Instructions: Machine wash in cold water. Tumble dry on low heat or line dry. See below. Foam - The CFC-free foam in our orthopedic and foam-frame beds can be ha...