I got this mattress for my daughter’s toddler bed. She loves it. It is a convertible crib that can grow with your child. One side is a firm crib mattress and the other side has a water resistant layer for a toddler bed. It also comes with a zip off cover, but I put a mattress cover over it for extra protection from accidents. It has a cooling technology that makes the mattress breathable. All I know is my daughter loves it, she sleeps great on it, and the mattress has stayed clean and smells fresh through a few accidents.