TheBenton Firm King Mattress has zoned individual coils that provide support where you need it most while reducing partner disturbance by up to 80 Firm Restonic foam and CoolGel quilting foam deliver reinforced cushioning for the entire sleep surface while the TotalEdge foam encasement system makes it easiergetting in and out of bed and retains its shape Special treatment of the fabric with phase change technology continually adjusts the temperature for a cool revitalizing sleep