Luvable Friends Fitted Crib Sheet is made of pure knitted cotton, making it soft and durable. These sheets are designed to provide a soft feel that babies will love feeling against their tender skin. Sheet have fully elasticized bottoms that will let them fit standard mattresses as well as toddler sized beds securely. Furthermore, they will provide a cozy and comfortable sleep for babies. Designed especially for longer wear and machine washable for hassle-free cleaning!