100% cotton Fits standard 28" x 52 " crib mattresses Machine wash / tumble dry From the parents trusted brand Gerber, this fitted crib sheet makes a pleasant addition to baby's nursery! Made of cotton sheeting, these sheets are soft and comfortable. The elastic edges provide a safe, snug fit on any standard size mattress. Machine washable and totally adorable! Keep it for your own baby or makes an excellent gift. Look for other coordinating items from Gerber for all your baby essential needs.