Features: Premium Quality: The glasses are made of metal frame and resin lenses, the lens has an easy-to-clean film and an anti-blue light coating, which can effectively protect against UV rays and harmful blue-violet light. Blue Light Blocking: Our glasses can effectively block mobile phone, computer, LED blue lights which will cause sore, swollen, itchy eyes, dry eyes, easy fatigue, decreased vision, and eye damage. Photochromic Glasses:The lenses of the glasses are clear indoors or at night. When the ultraviolet rays are strong, they will automatically darken, and when the ultraviolet rays are not strong, they will remain light. Ergonomic Construction: Flattering lines create aesthetically pleasing frame appearance, and ergonomic construction provides the best wear feeling and all-day comfort. After Sale Customer Service: If you have any problems about our products, please feel free to contact us, we are ready to help. We will solve your problems as soon as possible. Specification: Material: Metal,resin Glasses Width: 133mm Glasses Leg Length: 135mm Height: 47mm Single Lens Width: 52mm Nose Bridge: 19mm Product Weight: About 18.2 g Notes: 1. Due to the lighting effects and shooting angles, there is a color difference in the product, please understand. 2. Due to manual measurement, there is a tolerance in the product size. Include: 1*glasses