EC515-OCF Features: -Crib mattress. -Certified organic cotton cover. -Waterproof backing on cover. -High quality and extra firm. -Lightweight 8 lbs 7 oz. for easy sheet changes. -5'' thickness and square corners for snug crib fit. -Orthopedic style mattress fits all standard size American cribs and toddler beds. -Greenguard certified to have no hazardous air emissions. -Ecologically friendlier foam made with plant oils. -Passes C.P.S.I.A.. -Passes flammability standard 16CFR-1633 and 16CFR-1632.