The Basic Mattress Protector features a lightweight fabric surface that keeps your mattress dry throughout the night. Designed with a soft fabric to provide maximum comfort. Noiseless waterproof barrier that will not affect the feel of your mattress. Flexible surface dynamically reacts to your motion for the most comfortable fit. The mattress protector is also high-efficiency machine washable, which requires less water and energy, and can be placed in the dryer. Sidewall skirt fits mattresses up to 18" in height.