Features: Photochromic Glasses:The lenses of the glasses are clear indoors or at night. When the UV rays are strong, they will automatically darken, and when the UV rays are not strong, they will remain 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. Premium Quality: The glasses are made of PC and metal material, 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. Comfy Frame: Attractive lines create an aesthetically pleasing frame appearance, and ergonomic construction provides optimal fit 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,PC Glasses Width:138mm Glasses Leg Length:143mm Height: 47mm Single Lens Width: 52mm Nose Bridge: 20mm Product Weight: About 13g 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