Sleep comfortably all night long with the cooling comfort and elevated, adaptable fiber of this pillow. Powered by Reactex, it is tested to be 40x cooler than the standard non-Reactex pillows. Heat is pulled away from the sleeping surface and pulled away from the body to keep temperature at an optimal range for sleep. This pillow features 230 thread count polyester/nylon fabric cover for cooling. Filled with hypoallergenic down fiber and gusseted sides to provide support and comfort for all sleep styles.