FLAK JACKET XLJ ACCESSORY LENSESFrom day one, our goal with Flak Jacket was to create world-class sports equipment. Training & competition can take you from bright sun to overcast skies & everything in-between, so we engineered an interchangeable lens design that lets you adapt. With extra lens sets, you’ll always have the best optics for current conditions, & you’ll be ready for whatever the sun does ten minutes from now. The XLJ lens shape offers more coverage, & multiple options are available. Choose Iridium lens coatings to reduce glare, balance light, & get optimal performance in your current environment. When glare is blinding, take advantage of the best polarized lenses on the planet. Oakley polarization technology uses a liquid infusion process to bond the polarizing filter at the molecular level. That’s how we eliminate the haze & distortion found with conventional technologies & achieve unbeatable glare-cutting performance.