What is it? A special neck wrap made of polyester and cotton, filled with polycrystals. When placed in clean water for up to 30 minutes, the crystals expand and produce an evaporative cooling system for the user when worn around the neck. How to use it. The cooling wrap can be worn around your neck or forehead. By rotating the outside edge toward the neck, evaporative cooli9ng is maximised. Relief from excess warmth is instantaneous. How it works. Body Cooler lowers the body temperature by cooling the carotid arteries in the neck. The continuous moisture from the expanded crystals surrounding the warmth of the neck allows evaporation to take place. Please note - images provided are examples only. There are so many designs and colours available, we need you to contact us by email: [email protected] or phone: 1300 551 951 to let us know your preferences and to choose your Buff.