Tadpoles quilted waterproof mattress cover features a quilted top for luxury comfort and softness. 100% waterproof polylaminate underside protects your child s mattress from liquids bottle spills and potty training accidents. Flexible knit sides hug mattress to keep it snug smooth and centered. Simple to put on and remove with easy care machine wash and dry. Fits all standard crib and toddler size mattresses.