The Arctic Bandanna Cool Tie is a very effective neck cooling bandanna. They are about 38 inches long and can be used as a neck cooler or as a cooling headband. A real must for golfing, tennis, biking, gardening, hiking, fishing and more. They are reusable hundreds of times and to activate and get ready for use, just soak in water for about 25 minutes. For extra cooling, they may be refrigerated.