The Jaxon Polarized Sun Bifocal is the classic retangular style favored by so many of our customers. The lenses are polycarbonate and 100% UV protected. The lenses are polarized. This polarization process on a bifocal requires higher technology which makes them more expensive than our normal sun bifocals. Many of our customers who prefer polarized lenses think that the higher price is well worth it. The frame has a spring hinge for a comfortable and flexible fit. The frame is gunmetal with gray-tinted lenses. Frame Measurements: 5 1/2" x 1 5/8" (temple to temple x height of lens)