The shape is known as cat eye, which is a great match for oval and rectangle-shaped faces. The frame colour is mostly black, which is an easy colour to wear and remains an excellent and reliable choice for an everyday yet elegant style. The lens colour is grey, which reduces glare and improves colour perception. These glasses have gradient lenses, which means they are darker on the top and gradually transition to lighter on the bottom. Not only is this effect super trendy and stylish, but it's also good for driving and allows for a clearer view from the bottom while inhibiting the bright sky from damaging your eyes from overhead. The material is mainly made of lightweight and durable plastic.