Sahara Nights Pillow Case Cover: Luxury Hotel and Resort Pillow Case made with a Premium Cotton & Polyester for a Super Soft and Cozy night sleep - (King Pillow Case) A classic look with a crisp, comfortable feel in a 250 thread count 60% cotton/40% polyester yarns provides increased durability Unique anti "wear & tear" weave construction guarantees longer fabric life Machine Washable Trusted by Luxury Hotels around the world.