13-INCH MATTRESS: Firm-feel mattress. INNOVATIVE COOLING MATERIAL: Tempur-Pedic Pure Cool Plus Material is designed to pull heat away from your body so even the hottest of sleepers can stay cool—all night long. PRESSURE-RELIEVING MATERIAL: One-of-kind Tempur-Pedic Ventilated Advanced Relief Material is enhanced with added ventilation for increased airflow—for deeper, more restful sleep. HEAT-DIFFUSING LAYER: This exclusive technology is added to the top of our Pure Cool Plus material to work with Ventilated Advanced Relief material to help absorb excess heat throughout the night and provide an enhanced cooling effect. COOL-TO-THE-TOUCH COVER: A patented removable, machine-washable cover has heat-absorbing fibers that draw heat away from the body for cooling comfort.