The Flak 2. 0 Prizm Sunglasses take Oakley performance engineering to the next level, and bring plenty of style along for the ride. Prizm technology and XYZ Optics ensure premium vision whether you're riding, running, or hitting the links, and these shades have a lightweight and comfortable design that helps you perform at your best no matter what you're doing. Polarized lenses with Prizm technology not only eliminate glare, but they also enhance colors and contrast for a sharper, brighter view of the world. The incredibly light O-Matter frame is subtly flexible for enhanced comfort, and Oakley's patented Three-Point fit eliminates painful pressure points while holding the lenses in precise optical alignment for undistorted vision. Hydrophilic Unobtanium nose and temple pads get tackier when wet so your shades don't slip when you're working up a sweat on a long bike ride or you get caught in the rain while trying to finish up the perfect round of golf.