The Beautyrest Black AIRCOOL Two-Stage Crib and Toddler Mattress features innovative technologies to give your child safe, comfortable and restorative sleep. At the core of the mattress, 231 luxury pocketed coils springs provide a firm foundation, while the BeautyEdge foam encasement ensures the mattress is stable all around. Designed to deliver the precise level of support each age range requires, this mattress has two distinct sidesthe infant side is the ideal firmness level babies need, and the toddler side features a layer of high performance AirCool gel memory foam to keep your child a comfortable temperature. To help achieve the ideal sleeping experience, this mattress is topped with an Argentum+ woven fabric cover that combines moisture wicking technology with natural silver ion antibacterial properties for a cool, comfortable surface.