The typical Beautyrest comfort and quality is found in this waterproof pad. The polyester, top layer covers a soft padded middle layer. Beneath the padded middle layer is the waterproof vinyl layer that prevents moisture from reaching your mattress. Having the vinyl waterproof barrier underneath the padded layer lets the mattress pad be more comfortable since your body will rest on the padding. The skirt clings to mattresses up to 13 inches deep, securing this pad in place. Easily machine wash and dry for optimal mattress protection.