Duco Polarized Clip-on Sunglasses Flip-up Eyewear- Aviator Style Glasses - Polarized Lens for Men and Women 3603 (Gray) Imported polarized TAC POLARIZED LENS- 100% UV400 protection coating, blocks 100% harmful UVAUVB& UVC Rays. Restore vivid color, eliminate reflected light and scattered light and protect eyes perfectly. TAC lens includes 8 layers. The 1st layer is polarization layer. The 2nd and 3rd layers are adhesive layers to enable durability. The 4th and 5th layers are UV protection layers to absorb UV light. The 6th and 7th layers are shatterproof layers.The 8th layers are anti reflective green coating. PRODUCTS DIMENSION-Lens height:50 mm (1.97 inches); lens width:64mm (2.52 inches); nose bridge:12mm ( 0.47 inches); frame total:140 mm (5.51 inches). STRONG STURDY DURABLE- Metal clip ends with silicone sock to provide LONG LASTING durability and avoid scratch your lens.It fits precisely over prescription glasses for man to wear it in summer, or outdoor activity like cycling bicycle, driving, riding a motorcycle,running,fishing, racing, skiing, climbing, trekking etc. LIFETIME BREAKAGE WARRANTY ON CLIP & LENS - Clip and lens are unbreakable for no risk purchasing. In case any broken problem happens for any reason, even you stepped on it by accident, contact the seller of DUCO to get a new replacement.DUCO provides lifetime service for all DUCO products. 30 DAY MONEY BACK GUARANTEE- You can easy return and get refunded for any reason like I don't like the style,I don't like the color,etc. Don't worry,You have no risk to try.