Oakley Flak® 2.0 XL sunglasses redefine the boundaries of performance. The polished black o matter frame is not only durable, but also lightweight and comfortable to wear - perfect for those seeking a modern touch with superior performance. The Prizm Black Polarized lenses offer superior glare reduction and clarity, while enhancing contrast and detail for optimal visibility during high-contrast sports such as golf or cycling. These glasses are equipped with a Prizm Polarized lens treatment that further enhances outdoor experiences by filtering out glare and reducing eye fatigue. Available with prescription lenses.