Liberty ProVizGard Guardian anti-fog protective eyewear. Polycarbonate temples and single-piece wrap-around lens provide superior protection. Adjustable temples for a perfect fit. Scratch resistant lenses provide 99 percent protection against harmful UV rays. Meets or exceeds ANSI Z87.1-2010 high impact requirements. Amber lens is perfect for low light situations. It blocks out blue light and is perfect for working outside early morning or when skies are cloudy and overcast. Anti-fog lens is used when there are sudden temperature changes such as air conditioning, refrigeration and any other cold environments. The anti-fog coating minimizes lens fogging. Amber lens, black frame protective eyewear.