The Oxford Baby Pure Bliss Dual Stage Crib & Toddler Mattress consists of extra firm recycled polyester and a thermo-regulating knit cover. It is 100% breathable, durable, tear resistant, VOC and foam free, lightweight, and antibacterial. Additionally, it is hypoallergenic, water resistant, and meets all flammability standards. This product is Greenguard Gold Certified, meaning that it has been tested for over 10,000 chemicals and VOC's, and promotes a healthier sleeping environment for your little one