The Chill-Its 6700CT Cooling Bandana features advanced PVA cooling technology for relief in extreme heat. Lightweight and low-profile, this bandana is perfect for wear around the neck or under hard hats. A tie closure in the back makes for an adjustable, snug fit on a variety of head sizes. Heat-related illness continuously ranks among the top causes of worksite accidents and fatalities. Evaporative cooling technologies such as PVA (polyvinyl alcohol) 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 bandana is comfortable and refreshing for even the hottest days of the year.