Our sunglasses lens have UV400 protection. It can protect your eyes from harmful sun rays. UV400 refers to the reaction with ultraviolet radiation. UV rays are solar light with a wavelength of between 200nm ~ 380nm, it mainly damages the human eye's cornea, lens and other tissues, it causes ultraviolet keratitis and injuries to the corneal endothelial and the most common eye disease of solar cataracts. Our sunglasses use Polarized lens. It can make your vision more clear. Polarized lenses can filter glare and are designed to protect the eyes. Suitable for driving, boating, skiing and other activities; the lens will filter the glare caused by the reflection of sunlight from roads, water and snow. Polarized lenses are usually more flexible and suitable for wearing under various conditions whilst carrying out outdoor activities. Our sunglasses have 4 Coatings Protection (UV Blocking/Radiation Blocking/Antistatic/Anti-Oil) Except UV blocking, Radiation Blocking and Antistatic Coatings, the lenses have another high-end coatings: anti-oil coating, which can prevent oils adhering to the lens; with this type of lens, fingerprints are not left as easily, and it is easy to wipe away any residual oils. How should I care for my sunglasses? To avoid damage, never clean your sunglasses with paper towels or clothing, which can grind dust and fibers into lenses and leave scratches. Also avoid using household detergents or soaps. While a few mild soaps don't harm lenses, today's extra strength soaps are powerful enough to slowly disintegrate lens coatings.