Modulator lens goes from the resting light density stage to light colored density in 5 seconds and back through the resting stage to dark colored in 11 seconds - this is a true innovation in light sensitive lens technology. Sealed double polycarbonate vented lens design with P-80 anti-fog design. Photo chromatic lenses change darkness to match conditions. Two-layer, extra-soft face foam for comfort. Carbo glass quartz scratch resistant lens coatings. Over-the-helmet design. Great peripheral sweep lens design. Black night frame. Fits medium and large faces.