Serta’s Perfect Start Limited Dual Sided Baby Crib Mattress and Toddler Mattress helps deliver a safer, heathier and better night’s sleep for your newborn, infant or toddler. The core of this crib mattress is made from over 300 recycled water bottles, making it the best choice for your baby, and the environment. Topped with a waterproof cover to help make cleanup easy, this mattress is the best choice for your baby. Fits most standard full-size cribs and toddler beds. A healthy and safe choice for your baby, all Serta crib mattresses are GREENGUARD Gold Certified and meet the strictest standards offered by the Greenguard Environmental Institute, which recognizes products with low chemical emissions, contributing to improved indoor air quality in your home.