The Twinkle Galaxy Crib and Toddler Mattress by Delts Children has everything your baby needs for a healthy, refreshing sleep, each and every night. Built with a firm fiber core made from recycled bottles, it delivers the perfect firmness level for newborns and toddlers while helping save over 300 bottles from the landfillgreat for babies and great for the environment! Both sides of this mattress are topped with a vinyl waterproof cover thats hypoallergic, so all you need to do is flip the mattress when it comes time for your baby to move from the crib to a toddler bed. Finished with square corners to help create a secure fit inside a crib or toddler bed, the Twinkle Galaxy Dual Sided Recycled Fiber Core Crib and Toddler Mattress is the ideal choice for your growing child.