Rugged polycarbonate gray lenses filter 99. 9% of harmful U. V. rays, with MAX6 anti-fog coating for 6 times greater performance over generic anti-fog coating Meets or exceeds ANSI Z87+ high impact standard Foam lined for added protection and comfort Soft TPR extended from temples to nose pads for comfort and grip, lightweight and balanced frame with zero removable parts Dielectric (no metal parts)