Quantity: 1 * Frame material: Metal frame, due to the difference between different displays, the image may not reflect the actual color of the project. Thank you! This set includes: 1 * glasses 1 * glasses cloth 1 * glasses box photochromic lenses are also known as photosensitive lenses ". glass lenses are adding silver halide, but now is the mainstream of photochromic resin lenses, adding spirals, etc. The acrylic lens in the chemical makes the original colorless and transparent lens become a colored lens under strong light, so it is suitable for indoor and outdoor use.