If you work outside then you know all to well how the back of your neck can burn. Even wearing sunscreen can't help some days. This device will reduce the risk of sunburn and cool the worker at the same time. Simply rinse with cold water, wring it out and attach to the hard hat. It also comes with a section to cool the top of the head as well. This is a very affordable option to protect workers and to prevent down time. These are designed to stay cool for hours and can simply be rinsed again for maximum coolness.