Fake Oakley Sutro sunglasses frame material is lightweight, durable and impact resistant, and extends to longer bayonet style legs that can be comfortably tucked under a helmet or hat. Unobtainium is used on the tips of the legs and nose pads to ensure the Oakley Sutros stay in place. Bike sunglasses won't slip off no matter where you're riding. They also feature lenses that filter UV rays and harmful light to protect your eyes.