Two inch thick polyester fiber filled rectangular cradle pad. The cover has a dust mite barrier, is hypo-allergenic, anti-microbial and non-toxic. This outer cover material is also stain resistant, waterproof and easy to keep clean with mild soap and water that helps make sure your baby's sleeping environment stays healthy and sanitary. Cradle size mattress has an overall size of 18" X 36' X 2". Proudly made in the U.S.A from domestic and imported sources.