Soft and breathable 100% organic top layer keeps baby comfortable. Waterproof and breathable polyester back protects mattress from soil. Quilted with a soft and breathable middle layer of polyester for absorbency. 9" deep pocket fits most standard crib and toddler bed mattresses. Elastic all around secures mattress pad cover in position. Machine wash and dry. Fits 28"x52"x9" mattresses.