100% Waterproof - repels all liquids including bodily fluids, perspiration, urine and accidental spills * Hypoallergenic 100% cotton terry surface and polyurethane backing inhibits allergy-causing dust mites and bacteria from living in your mattress * Fully elasticized fitted sheet style fits all mattress depths from 6" to 22" * Unique design is breathable, quite and sleeps cool * 15-Year product warranty guards against manufacturer defects