More babies sleep on a Sealy than any other brand, making Sealy the number-one crib mattress brand. The Sealy Ortho Rest crib and toddler bed mattress is tested for durability with 150 interwoven steel coils for firmness, double support and comfort layers and an easy-clean cover. It fits both cribs and toddler bed frames. Sealy's SecureStay Crib Mattress Pad provides added comfort and softness for your baby and is a super-absorbent pad, which keeps baby dry.