1. Arc lens, press close to face,more comfortable 2. Four fore-and-aft adjustable positions for individual face 3. With rope hole in glasses leg, agile and convenience
4. Scratch and impact resistant Polycarbonate Lenses 5. Black , Navy Blue and Red, different color choice for frame 6. Special mercury layer protect against ultra violet and other hazard rays(choice) 7. Anti-Fog coated lenses for chemical & medical purposes 8. Different color lense for different purposes a) Grey : Outdoor .Block over UVA&UVB b) Clear : General purposes c) Yellow : Night driving and pilot .Llight sight d) Red : Special UV mixed.Anti-Laser rays e) Orange : Soft sight. Filtrate electric wavelength and infrared ray f) Mercury layer: Protect against giddy light , intensity light and astigmatism Strongly 9. Conform ANSI Z87.1.