Naturepedic Organic Crib Mattresses for Baby and Children typically use materials such as vinyl/PVC and polyurethane foam which release questionable chemicals over time. These materials and chemicals have been eliminated in the No-Compromise Organic Baby Crib Mattress. Babies in particular spend up to 70% of their early life sleeping and playing on a crib mattress. Your baby’s health and safety should not be negotiable. This mattress has also been tested for chemical emissions and certified by GREENGUARD® to meet their strict standards for children.