With the Lullaby Earth Breathable 2-Stage Crib Mattress, you and your baby can rest easy. Crafted in the U.S.A. from gentler, food-safe materials, this mattress is easy to clean and designed with safety in mind. The breathable cover is removable and washable for 360° air circulation without sacrificing hygiene. Dual firmness allows this mattress to grow with your child, with a firmer side for infants and a softer side for toddlers. All Lullaby Earth mattresses are MADE SAFE® certified non-toxic, which means we don't use polyurethane foam, flame retardants or any of the harmful materials commonly found in crib mattresses - because parenting is hard enough without worrying about toxic chemicals!