The Sealy Baby Ultra Classic 2-Stage Crib Mattress and Toddler Mattress is a 2-stage dual firm crib mattress made with extra firm spring coils and airy cushioning. The design grows with your baby with a firmer infant side and a slightly softer side for toddlers. A high coil count of 204 coils is tightly interwoven for excellent firmness throughout and enhanced with a secure steel edge system. Exclusive ever edge corner and side protectors enhance key areas of the mattress. Multiple comfort layers of airy cushioning that are air quality and chemical tested do not put excessive pressure on a baby's growing body. An exclusive EPA-approved Staph-Gard surface helps eliminate bacteria. 100% waterproof cover. Fits all USA standard full-size cribs and toddler bed frames. More babies sleep on a Sealy than any other crib mattress brand in the USA. With spring, foam, and hybrid designs there is a style that fits every infant and toddler with the firmness, comfort, and safety expected from the leading brand. Every Sealy crib mattress passes GREENGUARD GOLD Air Quality Certified, CPSIA testing, passes ASTM crib mattress standards including tests for firmness, durability, and resiliency. Sealy proudly supports infants and toddlers with industry-leading crib mattresses that go above and beyond when it comes to safety, quality, comfort, and premium support.