ZONED GEL DOUGH®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