I received this as a participation prize for a marathon, but I'm not going to use it, so I'm putting it up for sale. Cool the water-retaining part in water for about a minute, wring it out lightly, and wrap it around your neck to get a cooling sensation through evaporative cooling. It can also be used for UV and heatstroke protection. Material: 100% polyester Size: 110cm long x 15cm wide Brand new, unused.