2-STAGE DUAL FIRMNESS DESIGN: Best-in-class lightweight 2-stage dual firmness grow-with-me crib mattress features our CooLuxe soybean cool gel memory foam that offers an ultra-firm foam core creating a safe, flat surface for newborns and infants COOL AND BREATHABLE: Elegant and durable cotton fabric cover is airy and breathable on babys skin. Waterproof and allergy barrier keeps liquids from seeping inside. Cotton wrap for added comfort and protection. FAMILY FRIENDLY FOAM: Features American-made CertiPUR-US certified foam. Certified foams are made without PBDE fire retardants, lead, mercury, prohibited phthalates and other potentially harmful materials. ULTRA LIGHTWEIGHT: This foam mattress weighs only 7 pounds making it to easily lift and change the crib sheets and pads. Perfect crib and toddler bed fit, dimensions 51.63 x 27.5x 5 MADE IN THE USA: Sealy Crib and Toddler Mattresses are designed, engineered and proudly made in the USA of U.S. and imported parts. Lifetime warranty on workmanship and materials