Phillips Model RG-1388 radiation protective glasses offer a stylish frame design, constructed of high impact TR-90 nylon. It features rubberized soft grip temple bars and nose pads for secure fit and has lateral protective side shields to protect around the orbit of the eye with .50mm lead equivalency. The product comes with our standard high quality, distortion-free SF-6 Schott glass radiation-reducing lenses with .75mm lead equivalency. Model 1388 fits best for Medium and Large style heads.