Engineered for optimal air flow for your baby's health and comfort, our Dri-Tec® 2-Stage Performance Crib Mattress is designed to provide a safe, comfortable, and clean sleep environment. Moisture wicking fabric and patented 3D ventilated mesh keeps air flowing to maintain ambient temperatures. Constructed with a 2-Stage Comfort Core, one side is specially designed with a safe, firm surface for babies 0-12 months. Flip the mattress over for a softer, adaptive side to support toddlers 12 months and up. MACHINE WASH COVER, EASY CARE WATERPROOF & BREATHABLE CERTIPUR CHEMICAL FREE2-Stage ComfortThe dual sided React® Core and Air-X® panels promote air flow in, around, and through the mattress to keep your child comfortable all night.Stage 1: Infant SideProvides a safe, firm surface for infants ages 0-12 monthsStage 2: Toddler SideProvides a softer, adaptive surface to support toddler growth, for ages 12m+ Soft, moisture wicking fabric keeps baby dry and comfortable Interior comfort layers are encased in StretchWick® to offer a waterproof surface. Ships ready for infant use.The Cover Our engineered fabric cover promotes maximum air flow in and around the mattress.DRI-TEC® Dri-tec removable, washable, waterproof cover that wicks away moisture.AIR-X® Ventilated side panels increase air flow in and around the mattress.The FillSTRETCHWICK® ENCASEMENT Noiseless waterproof barrier provides added protection.½" SOFTER REACT Softer, adaptive side conforms to support toddler growth.5" FIRMER REACT Firmer side provides a safe, high resiliency surface for infants.Washable, waterproof cover