Safety Glasses – ST6638D. Sandstone Bronze Lens with Tortoise Shell Frame. Fashionable stream line design incorporates the elements of safety in trend setting eyewear. Soft PVC nose piece generates a cushion for a comfort fit. Metal emblem on temple presents this premium eyewear at the top of its class. 9.5 base curve lens provides excellent side protection, scratch resistant polycarbonate provides 99.9% UV protection. Exceeds ANSI Z87.1 High Impact Requirements.