This pillow features the latest advances in pressure-relieving comfort, support, airflow, and instant and long-lasting cooling. The Tranquil Aire memory foam of this pillow features proprietary, super open cell memory foam for maximum breathability to enhance comfort throughout the night. This memory foam is treated with antimicrobial protection for a clean, comfy sleep environment.In addition, it also features a proprietary Serene Chill Cooling Gel technology that provides immediate and long-lasting cooling when your head hits the pillow. Serene Chill is a state-of-the-art phase change material (PCM) technology that is designed to activate at key temperature ranges and keep your skin temperature in the optimal range for sleep, so you are always on the cool side of the pillow.For a soft, comfortable, and easy-to-clean surface, the Ridiculously Soft cover features a luxury zippered and removable jacquard fabric with a cooling fiber blend. Altogether, you will fall asleep faster and stay asleep longer in a deeper, more restorative sleep.Engineered with SHEEX SLEEPTECH TechnologySHEEX Performance Sleep | The support you demand, the Zen you desire. – Product Details provided by Manufacturer, not responsible for errors in information.