Combining the cooling benefits of Gel Dough� with the comfort and breathability of Zones Technology�, the Zoned Gel Dough� pillow offers optimal comfort for restful sleep. The Gel Dough� formula creates a cooler, softer memory foam that maintains form for better support than traditional memory foams. Zoned Technology� cradles the head while supporting the neck, providing exceptional airflow, making this one of the coolest, most breathable pillows available. Accompanying the pillow is a luxuriously soft rayon from bamboo velour cover, excellent�for sensitive skin and temperature regulation.