Sealy uses Individually Wrapped SealyStability™ Plus Encased Coils for customized support as well as reducing motion transfer. With the addition of the exclusive CoreSupport™ Center, you'll feel the extra support in your core and and back, letting you wake up refreshed and pain free. The Coils are Encased with a DuraFlex™ Edge System which firms up the edge, giving you full use of the mattress surface. Layers of SealySupport™ Soft and Firm Foam, cushion you firmly yet softly. Sleep cooler as a layer of Gel Memory Foam helps dissipate heat and a special Moisture Protection Cover pulls moisture away, keeping you dry and cool.. A good mattress for a back sleeper or side sleeper.