The two lenses within the Oakley SI Gascan Sunglasses Uniform Collection, available in polarized and standard, are actually cut from a single shield of optically pure PLUTONITE then placed in the frame to maintain the original, continuous contour. An innovation of HIGH DEFINITION OPTICS (HDO), POLARIC ELLIPSOID lens geometry extends clarity all the way to your peripheral view. UV filtering is an unbeatable 100% for every single ray of UVA, UVB and UVC. The lens curvature and frame architecture improve side protection, and durable yet lightweight O MATTER frame material maximizes comfort with a perfect Three-Point Fit.