The My Little Nest Cotton Crib Mattress Pad cover is made of a soft and natural cotton moisture repellent top surface. This 100% waterproof crib mattress pad has a soft cotton top with a waterproof laminate polyester backing to keep baby comfortable whether sleeping or playing . The chemical free waterproof tencel crib mattress pad is a must for any nursery, insuring baby's natural comfort while offering maximum waterproof protection for your crib mattress. The pad measures 71.1cm x 132.1cm x 20.3cm and has deep fitted pockets for a secure fit. Machine washable warm and tumble dry for best wear.