The exclusive Charter Club by Sealy Blissful Bay extra-firm mattress features trusted Sealy quality with an upgraded high coil density pocketed spring support system that has reinforced steel Quantum Edge coils. Its heavy-duty pocketed springs reduce movement, allowing for an undisturbed side-to-side sleep while layers of Perpetua copper latex and gel foams offer pressure relief and comfort. A stretch knit cover with Cooling Fibers and Lurex metallic thread accents to help you sleep better. The firmest Charter Club by Sealy model in the lineup.