The Chill-Its 6603 Evaporative Cooling Band features advanced PVA (polyvinyl alcohol) cooling technology for relief in extreme heat. When wet, this band remains lightweight and comfortable for bulk-free wear around the neck. A unique pull-through design allows the band to be secured around the neck for all-day cooling that stays put. Rated to UPF 50 protection from harmful UV rays. Heat-related illness continuously ranks among the top causes of worksite accidents and fatalities. Evaporative cooling technologies such as PVA are a simple, effective and comfortable solution for heat stress prevention. Similar to how sweat cools the body, evaporative technologies use an external water source to draw heat awayhelping to regulate body temperature while providing cool relief. When activated, this PVA cooling towel is comfortable and refreshing for even the hottest days of the year.