Sleep easy knowing that your baby is sleeping on the best crib mattress for breathability, safety, and comfort. The Air-X® Performance® Crib and Toddler Mattress is a 2-stage lightweight, convertible mattress, that grows with your baby. One side, designed for infants, is firm and supportive, while the other is soft and adaptive for toddlers, giving your child the support they need, when they need it. Plus, our removable, washable inner layer is engineered with our patented Air-X technology to enhance airflow and provide a comfortable sleep surface for your baby. The waterproof barrier protects the core for a clean and healthy sleep environment.