Lens width: 51
HD PA(polyamides(nylon)) Lens,9-base lense technology,PA（Polyamide）Nylon Lens is one of materials to manufacture sunglasses. It is of low density and light weight, so it is applicable to high-performance sunglasses. Its high-strength impact resistance, deformation resistance and non-rupture under strong impact protect the safety of our eyes. Its UV-light resistance degree is UV400.
Cellulose Acetate Frame is made from high-tech plastic memorable plate. It is of high strength, memorability, non-deformation, non-discoloring and durability. It is elastic. When it is bent or tensioned and then loosened, the shape of memorable plate will restore.
The metal part of the frame:monel metal.
◆Retro style sunglasses were extremely popular in the '50s and '60s, in the 80's in urban youth vogue become fashionable men and women of the special pet.
◆Grey lens: grey lens can absorb any chromatography evenly. Therefore, if you view the landscape with it, the landscape becomes dark, but there is no obvious aberration. It displays a true and natural feeling and belongs to neutral color system.
◆Brown lens can filter a large quantity of blue light, and improve vision contrast ratio and definition. The effect is better when you wear them in an environment where air is seriously polluted or it is fogy. Usually, it can keep off the reflected light of smooth and bright surface, but people wearing glasses still can see fine part clearly, so it is the best choice of driver.
◆Green lens: At the time of absorbing light, it maximizes green light reaching eyes. Therefore, it makes people feel cool and comfortable and thus is applicable to people whose eyes are easy to be tired.
◆Silver Mirror Lens: The surface of lens adopts high-density coating film. Such lens absorbs more incident and reflected visible light. Therefore, it is applicable to sports person.
◆Yellow lens can enhance contrast ratio and provide more accurate view, so it is also called Night Vision Lens.
YUFENRA Retro Polarized Sunglasses for womens mens HD Lens - B01N4GNL3C