Dr Chilly Ice Ring, Neck Cooling Tube, Portable Cooling Neck Ice RingFeatures Refreshing and CoolingIt cools physically, awakens the vitality of the skin, and makes you feel safer. Refreshing the MindIt dispels the sweltering heat and allows you to enjoy the long lost coolness. ReusableIt absorbs the cold air below the set temperature and freezes. When the ambient temperature rises, the accumulated cold air will be released to maintain a cool feeling. It won't be too cold and can be reused easily. Natural FreezingIt