Cardinal Health Essentials Reusable Underpads have ultra absorbent protection with 4 layers of protection including: a 100% waterproof, stay-dry, vinyl-backed polyester backsheet that locks out moisture and staining; a poly/rayon super absorbent soaker layer that absorbs and traps fluids; a minimizer polyester layer that prevents wetness from rising back to the surface; and a quilted cotton blend extra dry-touch top layer that wicks moisture into the pad protecting the skin and maintaining skin wellness. The non-slip bottom layer keeps the pad flat and in place. These reusable pads are machine washable.