The Sealy Starlight Supreme Hybrid 2-Stage crib mattress is the best of both a dependable innerspring plus the comfort of soybean memory foam combined into one baby mattresswith a grow-with-me infant to toddler design. The soybean memory foam topper offers luxurious comfort for growing babies and is gentle on a fragile child's body.Premium 150 coil innerspring system offering ultra posture support plus border wire all along edges for secure support and an extra-firm foundation. EverEdge strength pillars provide strength and stability for baby near corners and sides. Two hypoallergenic layers cushion and comfort baby while providing a supportive sleeping surface. Waterproof cover and lock-stitched waterproof binding resists stains, moisture and mildew. Quality and safety is key and the entire mattress is made without phthalates, lead, mercury, formaldehyde, PBDES, TDCPP, or TCEP flame retardants, features CertiPUR-US approved foam for durability and air quality, is tested for harmful chemicals and off-gassing, passes ASTM crib mattress safety standards and is a GREENGUARD Gold Certified baby mattress for a healthier indoor environment, certified by an independent laboratory. Sealy crib mattresses are made in the USA and backed with a lifetime warranty on all workmanship and materials. Use for infants and toddlers approximately 0-5 years. Tested for a snug fit inside standard cribs and toddler beds for years of use. Sealy crib mattresses proudly support you and your baby.Soybean-enhanced memory foam cushioning for luxurious comfort150 posture supportive interwoven innerspring coil system offers a lifetime of durability and firmnessFull perimeter border rods will keep the sides, corners and edges firm just like an adult mattressFirm infant side and softer toddler side for grow-with-me support and comfortHighly durable waterproof surface wipes clean with a damp cloth!