The Chill-Its 6717CT Cooling Hard Hat Pad with Neck Shade straps into hard hats to deliver up to four hours of cooling relief while also shading the neck from sun damage. The low-profile and lightweight pad with shade features advanced PVA (polyvinyl alcohol) cooling technology for instant cooling without bulk or slime, making it comfortable to wear under hard hats. The wide panel shade extends down for complete back-of-neck-coverage. This hard hat liner pad fits most hard hats and safety helmets, easily attaching to the suspension with two hook and loop straps. 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 away—helping to regulate body temperature while providing cool relief.