This cooling bandana can be worn all day long. Just soak the bandana in cool water and the water absorbs the crystals immediately, by activating them to expand over 200 times their regular size. Whether you're working out or just working in the heat, tie the cooling bandana around your head or neck and keep cool & comfortable all day long. Non-toxic crystals inside the cooling bandana hold water for natural evaporative cooling. The wet crystallized bandana works immediately to cool down the blood flow to your head thereby cooling off your whole body. Customers have repeatedly told us that the necktie crystallized wet bandana has been helpful for those having chemo as well as for women experiencing 'hot flashes' due to menopause. One customer uses the cooling bandana around her head to help with her migraines. So whether you're gardening outdoors or just need some cooling relief while inside, try the crystal activated cooling bandana. Because the water is absorbed into the crystals, the bandana won't drip, but will release water only as the surface starts to dry. This keeps it at an optimal moisture level. The bandana once used, needs to be re-hydrated only every few days. Approx. 35 inches long. Made in USA. Bandana comes in either a solid black or coloured pattern print.