The removable, machine-washable, and cool-to-the-touch SmartClimate cover features heat-absorbing fibers, drawing heat away from the body for added cooling comfort. Specially ventilated TEMPUR-Material delivers additional airflow and breathability, while providing pressure relief and motion absorption. Advanced Relief Material is the most pressure-relieving material made by Tempur-Pedic and contours to your body for ultimate comfort. Hybrid technology mixes premium innersprings with a proprietary hybrid material to deliver a lighter, more-responsive feel that helps support any sleep position.