Unique weight-balancing design allows the face shield to sit in a balanced, compact position centered over the top of the hard hat when not needed. The shield easily slides into stowed position with one hand and can be quickly removed from the hard hat. Upper bracket ventilation features reduces fogging and lowers CO2 levels. 12 cal/cm2 Arc thermal protective value (ATPV) rating 7-1/2 inch x 20 inch (191 x 508 mm) viewing area extra light tint for increased visibility absorbs >99.9 percent of harmful UV radiation meets ANSI Z87.1 and tested to ASTM F2178 specifications optional anti-fog inner lens features an air-spaced design that further decreases fogging optional task light features a high-intensity LED light; purchase two for lighting on both sides of the face shield optional transparent chin guard increases your peripheral view for improved awareness and safety.