OccuNomix Miracool Blue Denim Bandana is made of cotton with cooling crystal for durability. It uses Miracool technology to keep neck or head cool and when worn cooling sensations are passed to pulse points and carried throughout the body. It stays hydrated for several days. Reusable bandana works without freezing. It increases alertness and productivity by keeping workers cool. Bandana is ideal for factory, construction and launDry room workers, welders, painters, chefs or anyone working or playing in a warm environment - indoors or outdoors.