Upgrade your Stokke Sleepi crib mattress to the only option on the market that is breathable, waterproof and certified organic. Crafted with organic cotton fabric and fill and without polyurethane foam, flame retardants, vinyl/PVC, phthalates or potential allergens, the Naturepedic Organic Oval Crib Mattress provides a healthier sleep environment for your baby. The mattress is waterproof at the surface – featuring Naturepedic’s innovative waterproofing made from non-GMO sugarcane – and wrapped in a removable, washable, breathable cover. This practical design offers increased airflow that doesn’t come at the cost of cleanliness.