Photochromic glasses, also known as "photosensitive lens glasses", refer to the lenses that are originally transparent and colorless when exposed to strong light such as sunlight or ultraviolet rays. This kind of lens completely absorbs ultraviolet rays and has neutral absorption to visible light; it can quickly restore colorless and transparent when returning to the dark place, and can protect glasses from strong light stimulation, so it is suitable for both indoor and outdoor use, mainly used in open air, snow, etc. Ground and indoor strong light source workplaces to prevent damage to the eyes from sunlight, ultraviolet light and glare. Weuse 1.1mm polarized lenses. The coated lenses are real film coated, and the color is quite beautiful. Photochromic glasses become gray after discoloration. UV Protection Coating coating Protect Your Eyes-1.1MM ultra-thin TAC polarized lenses effectively absorb glare, provide a soft and clear vision, without distortion and no dizziness. In addition, these polarized sunglasses mirror coating can effectively reduce light reflection and scattered light, protect against harmful UVA/UVB/UVC ultraviolet rays, truly protect your eyes. Comfortable Wearing Feeling frame is very light and flexible, resistant to extrusion and distortion, are not easily damaged. The matte lacquer is skin-friendly and comfortable, and the sturdy metal hinge will not drop when worn. The overall design fits better, completely covers your field of vision. For Outdoor Recreation and Sports-Very suitable for fishing, cycling, running, driving, walking, hiking, mountain climbing and other outdoor activities. The frame is flexible and durable, and the lens coating is stain-proof and waterproof. A variety of color lenses are available for you to choose, and the stylish design makes people focus on you. Safety and Eco-friendly- nose pads are not easy to cause allergies to people, and they do not have any harmful chemical substances, there are very safe. The lacquer and coating are durable and not easy to fall off, have a long service life.with rough or sharp objects, which is conducive to long-term use.