More babies sleep on a Sealy than any other brand, making Sealy the #1 crib mattress brand in the USA. The Sealy Baby Posturepedic Firm Luxury says it all with a luxurious fabric cover and adult-grade construction, this mattress won't bend! The Posturepedic coils have a 60 year history of dependable support and this rib mattress offers 220 exclusive adult-grade PostureTech coils, which are twice heat-tempered for durability and resiliency. Full perimeter border wire all around the edges to prevent sagging and interior weight distribution bars add strength. 4 layers of hypoallergenic supportive layers plus a cotton-based cushioning wraps around mattress core and 6 Everedge pylons offer structure at the sides and 4 corners. Golden woven jacquard fabric cover is cool, comfy and stays clean! Fabric is specially treated with hospital-grade Staph-Gard to protect against bacteria and allergens while keeping liquids from seeping through. Specially crafted with waterproof lock-stitched binding instead of cotton binding so wetness doesn't seep inside to cause mold and bacterial growth and means the entire cover can be wiped clean! Airflow pocket keeps mattress fresh without the use of small metal vent parts. Measures 51.625 x 27.25 x 5.75 inches and fits both cribs and toddler bed frames. Lifetime warranty on workmanship and materials. For almost 130 years Sealy products have been synonymous with quality, durable materials, sleep science and the latest technology to bring great rest to every kind of sleeper.