Oakley Flak 2.0 S OO9511 951102 Sunglasses. These sunglasses feature a square frame made of O_matter, making them a perfect accessory for those who love a decisive style. The white color and blue lenses provide a modern look. Recommended for round and oval faces, as they add definition and structure to the features. Ideal for men and women. The S edition offers a smaller frame size with enhanced lens coverage, and every millimeter of the peripheral view is optimized with High Definition Opticsâ„¢ in a durable yet lightweight design that takes performance to the next level and brings style along for the ride.