Oakley has partnered with Transitions Optical to create lenses that darken and lighten automatically. The patented innovations of Oakley optics are blended with photochromic technology which actively tunes the amount of light that reaches your eyes. Even better, the lenses include base colors that precisely balance light transmission and boost visual contrast to improve depth perception. This unique blend of innovations gives you the ultimate in performance and comfort while improving safety in environments ranging from overcast to bright sun. The XLJ version of our HALF JACKET® frame offers extended lens coverage for larger faces or for those who prefer an expanded field of view. Accented with true metal icons, the comfortably lightweight O MATTER® frame includes UNOBTAINIUM® components that increase grip with perspiration. The open-edge design extends your vertical field of vision, and each set of optional interchangeable lenses gives you the unbeatable clarity of HIGH DEFINITION OPTICS® (HDO®) plus 100% UV filtering.