The babyGap TrueSleep Crib and Toddler Mattress is as cool as it gets. The advanced temperature-regulating cover will help your baby achieve their optimal temperature by pulling heat away from the body or releasing it back when needed, for a truly personalized sleep experience. Its firm yet comfortable core is made from over 300 recycled water bottles, making it a healthy choice for your baby and the environment. A waterproof backing on both sides allows you to flip the mattress when it comes time for your baby to move from the crib to a toddler bed. Plus, it’s GREENGUARD Gold Certified, which means it’s built to contribute to cleaner air for a healthy home.