This 100% Breathablemattress not only helps regulate temperature by allowing air to pass through the entire mattress, but there are no harmfulVOC’s, off-gassing (that chemical smell when you open a mattress with foam), andno toxic emissions.It’sdesigned for extra firm infant support, and a comfortable plush side for your growing toddler. The infant side is made with afirm,durable support. Around the entire perimeter of the mattress, is a 2 inch, firmedge guardto support children as they begin standing.All materials used are eco-friendly, hypoallergenic, and breathable. This mattress isGreenGuard Gold Certified.