The Naturepedic Classic 150 Seamless 2 Stage Crib Mattress is constructed from hypoallergenic organic cotton to provide comfort and support for little ones. Featuring 2-stage dual firmness, this mattress is also waterproof and offers fire protection. The Classic 150 Seamless 2 Stage Crib Mattress by Naturepedic makes an excellent mattress choice for parents seeking to remove potentially harmful chemicals from their baby's nursery Certified organic cotton fabric and filling 2-stage dual firmness Features 150 coils, edge support, and a firm easy-to-clean non-toxic waterproof surface 100% polyethylene non-toxic and stain resistant waterproof surface Certified by GREENGUARD® to meet their strict standards for eliminating chemical emissions Safe hypoallergenic design that is free from harmful chemicals Measures 51.625" L x 27.25" W x 6" H Limited lifetime manufacturer's warranty Made in USA of U.S. and imported materials Model MC32