SEALY  Mattresses are designed by orthopedic surgeons. 
Their trademark characteristic is their interlocking coil system which provides added stability and durability. 

Compared to Simmons, the other leading brand, Sealy beds usually feel slightly firmer and are best for couples who are light sleepers. 

Couples who get in and out of bed frequently throughout the night may be better served by the independent coil system of the Simmons which isolates movement.