Made with modacrylic fibers, 6710FR Cooling Bandana Triangle Hats keep you cool while working in the heat. Flame-resistant material protects your skin from burns or fire-related injuries. Fabric meets ASTM F1506 and F2302 requirements for flame-resistant and protective clothing. Cooling hats are perfect for workers in construction, mines, oil and gas, electricity and more. Evaporative cooling technology activates when submerged in water. Once fully saturated, wear these cooling hats up to 4 hours. Reactivate the cooling process by soaking them in water again. Comfortably wear these lightweight, nonbulking hats with the secure tie closure that conforms to your head size so you do not have to readjust the fit. Wear them during strenuous activities or while working outside to stay cool.