Crews Law Over The Glasses (OTG) Dielectric Safety Glasses With Gray Polycarbonate Duramass AF4 Anti-Scratch Anti-Fog Lens. Durable Nylon frame with five position ratcheting temple design for optimum fit/positioning over prescription eyewear. Excellent orbital seal with non-slip TPR temple inserts for comfort and grip. Dielectric construction (no metal parts. Duramass AF4 anti-scratch anti-fog lens coating. Frame Color:Smoke with steel colored temples. Lens Color:Gray. Meets ANSI Z87+ Standard and blocks 99.9% of UV Rays.