The Cozy Snuggles Deluxe Dual 2-in-1 Baby Crib and Toddler Mattress from Safety 1st is made to last and grow with your little one. Its 2-in-1 construction comes with two different levels of firmness: one side extra firm support for infants and on the other, additional cushioning for toddlers. It's made with a high made with a high-density thermo-bonded fiber core made from polyester fibers and a 100% Polypropylene non-removable outer cover that is waterproof and stain resistant to wipe clean in seconds. What's more, it is suitable for any standard baby crib with internal measurements of 285/8 in. X 53 in. For optimal support and use, it is recommended to rotate the mattress every 2-3 months. Assembled in Canada, this Safety 1st mattress is made without the use of flame retardant chemicals and has achieved GREENGUARD Gold certification, meeting the standard for low-chemical emissions for a sleep environment that's always safe and sound.