POC was started with the goal of keeping athletes safe, and their AVIP line applies that goal specifically to road cyclists all POC products in the AVIP line focus on visibility and protection first, with plenty of POC's striking style added later. The DO Half Blade AVIP Sunglasses are one of the latest additions to the AVIP line, with a half frame design and high visibility coloring to help you be seen by motorists wherever your ride takes you. The frames are constructed with grilamid, a moldable synthetic blend that keeps the frames light while giving them high resistance to impact. Inside the frames sit interchangeable Zeiss lenses, which receive anti fog treatment to keep your vision clear during steamy midsummer weather, with rubber along the nosepiece and temple ensuring the glasses stay in place while you're in and out of the saddle. The oversized lenses and absence of a bottom frame work together to improve lower and peripheral vision while you're riding, and the lenses themselves were created to put the road's surface in sharp relief so you can keep a close eye on obstacles without having to look down when you're in traffic or navigating a narrow descent. For days when conditions call for different lenses, you can easily swap out the standard ones, and to really maximize your visibility, pair these sunglasses with POC's Octal AVIP helmet they fit securely under the helmet at the temples or in the sunglasses garage. Proposition 65 Warning for California Consumers: This product contains chemicals known to the State of California to cause cancer andor birth defects or other reproductive harm.