The standard for personal Occupational and Educational Personal Eye and Face Protection Devices.All our frames and glasses are certified under the standard for ANSI Z87.1 and they pass following tests
Plus mark - To determine if a lens has passed the high velocity test. Look for the "+" mark that indicates its approval at high impact. "V" and "S" marks - Other lens markings that appear on safety lenses are "V" (indicating the lens is photochromic) and "S" (indicating the lens has a special tint).