Combining the cooling benefits of Gel Dough® with the comfort and breathability of Zoned 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. A beautiful and soft Tencel™ mesh removeable cover adds the temperature- and moisture-regulating comfort of eco-friendly fabric. Cover: 100% Tencel™, Fill: 100% polyurethane gel foam.