The Original Hybrid mattress cradles to your body’s unique curves by offering enhanced pressure relief and advanced cooling technology. A medium-firm feel perfect for all sleeper types. The Original Hybrid combines cooling comfort, targeted lumbar support, and responsive pressure relief in a balanced medium-firm feel. Built with memory foam comfort layers and individually wrapped coils, it delivers breathable support for every sleep style. • Original Hybrid- Memory foam comfort layers paired with responsive coil support for balanced comfort and stability. • glacierTECH° Cooling Cover- Cool-to-the-touch fibers help create a refreshing sleep surface. • ChiroZONE™ Quilt Technology- Added lumbar support helps promote proper alignment and comfort. • CarbonICE™ Lumbar Support- Graphite-infused memory foam helps draw heat away while adding targeted pressure relief. • ARCFlow™ Comfort Foam- Breathable foam provides responsive comfort and support. • Responsive Comfort Coils- Individually wrapped coils help reduce motion transfer, reinforce edges, and improve airflow. Includes mattress only. Mattress plus box spring option also available. Mattress arrives compressed in a box and then regains its size and shape after opening.