With 360 degrees of airflow, Naturepedic makes what may be the only certified organic, waterproof and breathable crib mattresses in the world. The removable, breathable, machine-washable layer is extra thick for maximum breathability and doubles as a mattress protector. Lightweight for easier sheet changes. The Breathable Ultra features 100% GOTS certified organic cotton and a waterproof surface made from non-GMO sugarcane. It's 100% vegan, too. No glues or adhesives, no polyurethane foam, passes flame standards without fire retardants or chemical additives. Our 2-stage dual firmness option provides a firmer side for infants and a medium-firm side for growing toddlers. Switching over is as easy as flipping the mattress.