The two lenses within the Oakley SI Gascan. Sunglasses Desert Collection 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.