The Oakley Top Knot Sunglasses were designed using lightweight and durable O-Matter material for the front of the frames, and they utilized lightweight C-5 metal for the arms and nose piece to give them extra style and dimension. The frames have a metal inlay that keeps them from getting stuck in your hair, and they also have flexible hinges that help to optimize the fit and provide all-day comfort. Their HDPolarized lenses filter out 99% of reflected glare without haze and optical distortion for improved safety, comfort, and performance, and they feature revolutionary Prizm lens technology that provides unprecedented control of light transmission to maximize contrast and enhance visibility. Plus, the Plutonite lens material filters 100% of all UVA, UVB, UVC and harmful blue light up to 400nm to protect your eyes and keep them healthy in the long run. These classic cat-eye sunglasses utilized sleek metal details to give them a fun, modern twist, making them perfect to wear for any occasion!