Our Waterproof Changing Pad Cover / Cradle Sheet is lined throughout with TPU, especially designed with no seams to prevent leakage, so no changing pad liner or mattress protector is necessary. Clean up is a breeze and your Changing Pad and Cradle Mattress are fully protected. Soft and Breathy: 100% Jersey Cotton. Our Waterproof Changing Pad Cover / Cradle Sheet Sets are composed of light, soft and breathable fabric. Made from 100% high quality Jersey knit cotton, babies love our Cradle sheets, as they offer a soft, welcoming texture.