Serta’s Sertapedic Moongaze Toddler/Crib Mattress delivers the comfort your baby deserves and the support they need to get a restful night’s sleep. Featuring a thermo-bonded fiber polyester core for the firmness your little one requires; this sturdy mattress is covered in a waterproof vinyl cover for easy cleanup. Finished with square corners to help create a secure fit inside the crib, its lightweight design makes changing the sheets less of a chore. All Serta® crib mattresses are GREENGUARD Gold Certified.