The Spring Air Dublin Firm Back Supporter mattress offers you a combination of exceptional back support and pressure-relieving comfort. 504 VertiCoil spring unit provides consistent coverage across the bed. The alternating coils evenly distribute weightand counteract force to deliver proper support and also deliver greater edge support. Higher density coils in the center third deliver longer lasting back support

Both hybrid innerspring mattresses and regular innerspring mattresses have an open structure which prevents heat buildup, enabling them to sleep cooler than an all foam mattress.