The Etherial Gold Plush Mattress by Sealy uses Individually Wrapped SealyStabilityâ„¢ encased coils for customized support as well as reducing motion transfer. With the addition of the exclusive CoreSupportâ„¢ Center, you'll feel the support for your core and and back, letting you wake up refreshed and pain free. The Coils are encased with high density foam to firm up the edge, giving you full use of the mattress surface. Layers of SealySupportâ„¢ Plush Foam, cushion you softly. A good mattress for a back sleeper or side sleeper.