1 Crib Mattress Brand in the USA 150 Interwoven Steel Coils for Firmness 2 Easy-Clean Cover 3 Fits Cribs and Toddler Bed Frames More babies sleep on a Sealy than any other brand, making Sealy the #1 crib mattress brand in the USA. The Sealy Perfect Rest crib and toddler bed mattress is tested for durability with 150 interwoven steel coils for firmness, full perimeter border wire for edge support and double support and comfort layers and an easy-clean cover. Fits both cribs and toddler bed frames. 10 year warranty on workmanship and materials. Meets or exceeds all flammability, lead, and phtlalate testing and does not contain toxic fire retardants.