Phillips Model RG-703 radiation protective glasses offer a stylish wrap-around style frame constructed of high impact TR-90 nylon. It features rubberized soft grip nose pads for secure fit, as well as our standard high quality, distortion-free SF-6 Schott glass radiation-reducing lenses with .75mm lead equivalency. The RG-703 fits best for Medium and Large style heads. All lenses are standard with .75 Pb Lead Equivalency, High-Lite Transmission Lenses with 20% More Visible Light, Schott SF6HT Glass Lenses.