Oakley Half Jacket XLJThe Oakly Half Jacket XLJ features a jet-black frame and three interchangeable lenses. Fire Iridium lenses enhance colors often lost by the suns glare. Slate lenses optimize low light scenarios while the G30 lenses maximize contrast for extra detail. All exceed ANSI Z87.1 standards. Oakly has partnered with Transitions optical to create lenses that darken and lighten automatically. The XLJ frame extends the lens coverage for larger faces or for those who want an expanded field of view. All the interchangeable lenses feature 100% UV filtering.