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 revolutionary Prizm lenses provide unprecedented control of light transmission that maximizes contrast and enhances visibility, while 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!