The Twinkle Stars Limited Recycled Fiber Core Crib and Toddler Mattress by Delta Children provides your little one with the support and comfort they need each and every night. The firm support comes from the high-density thermo-bonded fiber core thats made from 300 recycled water bottles. This baby mattress is also incredibly lightweight, which makes it easy to change the sheets, maneuver or flip. Topped with an innovative knit cover, the fabric features a three-dimensional structure that allows air to flow through the fabric and under your baby. The cover is also backed with a waterproof layer that keeps the mattress clean. Finished with square corners to help create a secure fit inside a crib or toddler bed, this mattress is the ideal choice for your growing child.