Your baby will enjoy the comfort and protection of Serta’s Sertapedic Fitted Crib Mattress Pad. A quilted top offers baby ultimate cushioned comfort, while a 100% waterproof underside protects the mattress from liquids. Designed to perfectly fit most standard sized crib mattresses, the elasticized corners ensure the pad will stay snugly on the mattress, preventing shifting and sliding. This pad is machine-washable for easy cleaning.