NicelyFit Replacement Lenses are professionally crafted to precisely fit into your authentic Oakley Flak Jacket XLJ Sunglass frames. These lenses feature: Made of top quality HD polycarbonate Extremely durable, light-weight, and scratch resistant 100% Polarized with anti-Glare technology 100% UV400 protection against UVA & UVB Rays Meets and exceeds all current FDA Impact Resistant Safety Standards Exceeds the European Safety Standard EN 1836:2005 Exceeds ANSI Z80.3 Standards One Year Warranty.