Pacific Coast Sealy Posturepedic Absorba Super Absorbency Waterproof Cotton Top King Mattress Pad Super-absorbent waterproof mattress protection Reverse-coated with supple, breathable polyurethane backing 100 percent cotton top with 200 thread count and premium fiber filling ReliaGrip spandex skirt snugly fits mattresses up to 16 inches thick King, 80 inches long by 78 inches wide