For over 50 years, Marriott has been providing each guest with the highest quality and most comfortable bedding available. Our cushions have been tested and made by our guests. Meets Marriot highest standards King size (20" x 36") down alternative pillows are made of polyester cluster fibers. The fiber balls are rearranged to increase elasticity and bulge. Cluster fiber filled products retain their shape and provide long lasting support. This pillow is a woven 233 thread count cotton cover that protects you from allergies and moisture. Machine washable. This pillow is guaranteed to be a pillow manufactured specifically for Marriott Hotels. We cannot guarantee products from other vendors or retailers.