Sertapedic Moongaze Crib and Toddler 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. Dimensions 52 inch x 27.5 inch x 6 inch.