Top layer and sides composed of 100% cottonFilled with a soft polyester for extra cushion and supportBack features a 100% waterproof vinyl for extra protectionFitted for portable-size mattressesOnion-pattern quilt topFitted pad so it stays put. Get that added layer of protection with the American Baby Company Portable/Mini Size Waterproof Quilted Fitted Mattress Pad. This mattress features a textured 100% cotton onion quilt as its top layer to provide a cushioned supportive surface for your baby. A soft polyester filling provides that much more support and enhances durability. The waterproof vinyl backing provides additional protection. This mattress pad measures 38 x 24 inches. American Baby Company Inc. is a leading U.S. manufacturer of baby bedding that emphasizes high-quality comfort and safety. They are a leader in the industry at providing fast delivery of premium-quality products at reasonable prices.