Lightweight which makes for easy sheet changes. Triple layer nylon reinforced vinyl waterproof cover. Tear-resistant and non-allergenic. Durability assured with strong cloth binding. Double row of eyelet vents assures mattress freshness. Easy to clean with damp cloth and mild soap. Square corners provides snug fit in all standard size American cribs and toddler beds. CertiPUR-US certified high quality firm foam. Passes all federal and state requirements including 16CFR-1632 and 16CFR-1633. CPSIA safety standards for flammability and chemical composition. GREENGUARD children and schools certified to have no harmful air emissions. 5 in. thickness. White color. Made in USA. 51.63 in. L x 27.25 in. W (8 lbs.)Classica I mattress has become the standard by which all other foam crib mattresses are judged. This multiple award winning extra firm foam crib mattress was rated #1 of all crib mattresses tested by one of the nation's leading consumer products magazines and has been a recommended buy for over fifteen years by another popular baby products publication. The crib mattress is actually a more important product that are specifically for the benefit of the child and not just for the convenience of the parents. The child will spend the first three to five years of their lives sleeping and playing on this mattress are the best reasons to buy a quality crib mattress.