DUALSIDED MATTRESS Crib toddler mattress is designed to grow with your baby The smooth firm side is recommended for the infant stage Convoluted side is recommended for the toddler stage Flip mattress from infant to toddler side as baby grows GREENGUARD GOLD CERTIFIED FORMALDEHYDE FREE CERTIFIED Certified products are screened for more than 10000 chemicals and VOCs known to pollute indoor air Lab tested in environmental chambers and certified by UL to be free from formaldehyde MACHINEWASHABLE WATERPROOF COVER Featuring an ultrasoft removable machinewashable outer cover with waterproof sleep surface Gently unzip outer cover machine wash in cold water delicate cycle no bleach and hang dry do not place in dryer MATTRESS IS READY TO GO RIGHT OUT OF THE BOX Mattress arrives fully expanded so its ready to be placed into your crib or toddler bed right out of the box Mattress is fiberglassfree free of chemical flame retardants and certified formaldehydefree DIMENSIONS Fits any standard fullsize crib and toddler bed L 52 in x W 28 in x H 6 in Weight 12 lbs Mattress core 100 polyurethane foam Mattress cover 100 polyester Backed by a 10year limited manufacturers warranty