Your little one will sleep soundly on this DaVinci Twilight Ultra Firm Deluxe Crib Mattress. Firm yet cozy, this universal-fit crib mattress boasts hypoallergenic construction for your baby's health and well-being. The eco-friendly padding is made from 100% polyester and also features a reinforced triple-laminated cover to protect when nighttime accidents happen. It also boasts an ultra-fresh additive to prevent bacteria from forming.