Uniquely combining three pillow technologies, the Contour Gel Dough^™ + Z^™ Gel pillow offers maximum cooling and comfort. A layer of Z^™ Gel extends over the entire surface of the pillow to capture and dissipate heat. Underneath the Z^™ Gel is soft memory foam shaped in an ergonomic contour design that correctly aligns the spine. Accompanying the pillow is a luxuriously soft rayon from bamboo velour cover, excellent for sensitive skin and temperature regulation. Cover: 75% polyester, 25% rayon from bamboo Fill: 100% polyurethane gel foam