The Oakley Standard Issue Flak® 2.0 XL Blackside Collection is a must-have for all those who love to look sharp and be active at the same time. Its rectangle shape and matte black color add an extra touch of style to your everyday look, while its o matter frame material ensures durability and comfort throughout the day. With polarized prizm black lenses, you will always have optimal vision no matter what activity you're engaged in. Available with lens contrast enhancement technology.