Features: Premium Quality: The glasses are made of TR frame and AC 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 UV rays are strong they will automatically darken and when the UV 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:TR AC Glasses Width: 141mm Glasses Leg Length: 141mm Height: 43mm Single Lens Width: 53mm Nose Bridge: 18mm Product Weight: About 19 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. includes: 1*glasses "