360 degrees of airflow so baby can breathe even when face down. Naturepedic makes the only breathable + waterproof + organic crib mattresses in the world. Removable breathable machine-washable layer is extra thick for maximum breathability. Includes free mattress protector. Lightweight option for ease and safety. Innerspring option for maximum strength. 100% GOTS certified organic cotton. Non-Toxic waterproof layer made from non-GMO sugarcane, 100% Vegan. No glues or adhesives, no polyurethane foam, passes flame standards without fire retardants or chemical additives.