Give it your best on game day by being fully prepared from head to toe. The Oakley Flak Jacket XLJ Sunglasses feature High Definition Optics for optimum clarity, so your performance is on point. Stress-resistant O-Matter frame material is durable and provides all-day comfort. Optimized peripheral vision and side protection let’s you optimize your performance, while the Three-Point Fit holds the lenses in precise optical alignment. Your eyes will stay guarded from the sun with UV protection that filters out 100% UVA, UVB, UVC, and harmful blue light up to 400 nm. The lenses adapt to variable light conditions, and a special coating on the lenses reduces glare. The optical precision and performance, as well as impact resistance meets all ANSI Z87.1 standards.