Product Detail Waterproof Surface -easy-to-clean 100% polyethylene food grade waterproof surface, an excellent alternative to the vinyl/PVC typically found in crib mattresses, polyethylene is used throughout the food packaging industry for purity and non-toxic properties Organic Cotton Filling –100% organic cotton promotes a healthy and more chemical-free sleeping environment; organic cotton is natural and renewable, unbleached, undyed, and grown without synthetic pesticides, herbicides, or chemical fertilizers Hypoallergenic / Dust Mite Barrier Cover - No need for an additional dust mite barrier encasing, free of wool or latex - No need to worry about these potentially high allergy materials Firm Support - Heavy-duty 252 coil orthopedic innerspring and firm flat surface provide ideal support in accordance with pediatrician and Consumer Product Safety Commission firmness recommendations, heavy-duty border rods add strong side and edge support Fire Protection – Non toxic fire protection system meets and exceeds all Federal and State flammability standards without the use of potentially harmful chemicals . The "Naturepedic No Compromise Organic Cotton Classic 252 Crib Mattress" is best product for you. We recommended Naturepedic No Compromise Organic Cotton Classic 252 Crib Mattress