Give your eyes the ultimate protection from the elements with the Oakley Flak XS Sunglasses. Engineered for youth faces, the Flak XS featuring lightweight O Matter frame and Unobtainium ear-socks and nose-pads ensures superior protection in any condition. Change the way you see the world with these sunglasses crafted with Polarized and Iridium lens options. Oakley Flax XS Sunglasses features: Lightweight O Matter frame material with ellipse metal icon accents brings durability. Unobtainium ear-socks and nose-pads increase comfort and performance. Polarized and Iridium lens options with an interchangeable lens system. Available with Oakley Authentic Prescription Lenses.