KEY DETAILS 120 interlocking coils provide optimal support. Two sided: firm side for infants and a softer, foam-cushioned side for toddlers. Each side features a distinct design: The infant side is gray with white moons and stars; toddler side is white with gray moons and stars. Vinyl mattress surface is waterproof and easy to keep clean. All foams are CertiPUR-US® certified and made without PBDE flame retardants, mercury, lead and other heavy metals. GREENGUARD Gold Certified. Meets or exceeds stringent chemical and VOC emissions standards. Mattress edge has a square corner design for secure fit inside crib. Mattress fits all of our convertible cribs (sold separately); does not fit Mini Crib. Rigorously tested to meet or exceed all required and voluntary safety standards. Please read Safety Information tab for important crib safety callouts.