The waterproof crib and toddler protective cover has a top and bottom layer made of soft polyester material with a waterproof layer. The cover is quilted for baby's ultimate comfort and provides protection of the mattress and bedding. The fitted cover measures 28 inches in width x 52 inches in length x 9 inches in height and fits standard size crib and toddler mattresses. With elastic all around that fits the mattress snugly and securely. Machine washable, tumble dry low for best results.