Naturepedic The No-Compromise Organic Cotton Classic is simply the healthiest crib mattress available. It is waterproof, firm and eliminates potentially harmful chemicals from your child?s crib. It will provide your child with a more natural, healthy and comfortable sleep environment. n]Promote a Healthy Environment for Your Baby or ChildBaby and Children?s mattresses 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 Cotton 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. Learn more about the problems with crib mattresses.