Fitted diapers are held snug by means elasticized waist and legs and secured by Velcro or snaps. They consist of absorbent material covered with a soft layer that touches the skin. Fitted diapers are not waterproof; these diapers require a separate waterproof cover. Because fitted diapers are made in specific sizes, a baby might require two or more sizes of fitted diapers over the course of diapering.