Developed by the helmet manufacturer Tanizawa. 100% UV protection Protect your neck from direct sunlight. By using it wet it will cause the vaporization heat effect to help you chin your neck. How to use: Just soak it in water and squeeze it out lightly Attaches easily to your helmet Soft material reduces stress on your neck even after prolonged use. Washable so you can use it over and over again. Unique diagonal strap attaches to the headband The mounting position can be freely adjusted up and down.