Z Gel Infused Dough Memory Foam Pillow with Removable Tencel Cover - King - Mid Loft Cover: 75% Polyester, 25% Rayon from Bamboo Gel-infused DOUGH memory foam formula creates a softer, cooler, doughier memory foam Open cell technology promotes increased air circulation Tencel removable cover with superior moisture-management properties aids in optimal sleeping temperatures Naturally hypoallergenic and dust mite resistant; backed by a 5-Year U.S. warranty King Mid Loft measures 35 x 16 x 6