1.keep longer time. 2.tinted for sunglass 3.slim, thin. 4.High scratch resistance. 5. UC, HC HMC, HCT, superhyphobic. Audited Supplier by Alibaba & Intertek1) imported material from Italy. Longer time won't be yellow.2) More easy for tinted the color fur sunglass.3) Diameters: 50mm,55mm, 60mm, 65mm, 70mm,75mm4) Uncoated lens, hard coated and Multi-coating,HCT,Super hard5) progressive,flat top/ ...