The Guardian Shooting and Safety Glasses by Allen are a great choice for those who want a good pair of safety glasses with a yellow lens. These safety glasses are made using a yellow, high-impact, polycarbonate lens that meets ANSI Z87+ ratings. The lenses are also anti-fog, U.V. and anti-scratch coated so that they last a long time. The frame is designed with a soft padded nose and temple so these glasses can be worn comfortably for long periods. The frame of the Guardian Safety Glasses has an adjustable hinge that can allow the frame to be adjusted vertically. The length of the frame can also be adjusted giving you the perfect fit.