Naturepedic's No-Compromise Organic Cotton Ultra crib mattress is designed to provide a healthy, natural sleep environment for babies. Provides firm, comfortable support with 252 inner spring coils and a center support. Mattress features border wire and non-toxic fire protection. Premium organic cotton waterproof top with organic cotton filling provides long-lasting durability. Organic cotton surface is 100% polyethylene coated. Polyethylene is an environmentally friendly, PVC-free plastic that provides the ultimate non-toxic, waterproof and stain resistant mattress cover. Safety first - HypoallergenicDetails, details - Orthopedic innerspring feature 252 coils for firm, comfortable support - Fits our entire collection of cribs - Made in USAShow 'em what you're made of - Certified organic cotton construction and filling