Z Gel-Infused DOUGH Memory Foam + Liquid Z Gel Pillow with Removable Tencel Cover - Queen, High Loft A unique combination of gel-infused memory foam and cooling liquid gel provides the best temperature regulation A layer of liquid Z GEL covers the top surface to capture and distribute body heat Gel-infused DOUGH memory foam formula creates a softer, cooler, doughier memory foam Tencel removable cover with superior moisture-management properties aids in optimal sleeping temperatures 5-year U.S. warranty; includes one pillow with cover