Polycarbonate. Safety glasses help protect your prescription glasses and come in clear lenses. Metallic coating provides 100% UV protection. Fit-over prescription safety glasses are ANSI Z87.1 impact resistance rated. Over-sized temples are designed to avoid adding pressure to the side of your head and are vented to reduce fogging. Wrap-around frame doesn't impede your field of view and a rubber guard on the top ensures a comfortable fit. Shooting safety glasses are suitable for those looking for more .coverage and won't interfere with many styles of shooting earmuffs.