The 6-Inch 2 stage EcozyKids Crib Mattress offers two different firmness for your infant's support and toddler's comfort. This 100% Breathable mattress not only helps regulate temperature by allowing air to pass through the entire mattress, but there are no VOC's, no off gassing (that chemical smell when you open a mattress with foam), and no toxic emissions. All materials used are eco-friendly, hypoallergenic and breathable. The polyester cover is water repellent and washable for easy clean up. This mattress is GreenGuard Gold Certified.