TR Frames Triacetate Cellulose Lenses Polarized UV Protection Coated Lenses Width: 62mm TAC Polarized Lenses - Lenses are made of triacetate cellulose (TAC) material. TAC has excellent optical properties, prevents shrinkage of PVA polarizing film, high surface strength and scratch resistance. Restore true colors, eliminate reflected light, and perfectly protect eyes. HIGH QUALITY FRAME These sunglasses feature high quality TR90, UV400 protective lenses, reinforced metal hinges, all the details to ensure you will use them for a long time. Stylish and Unique Design They are perfect for outdoor activities such as driving, shopping, traveling, etc. Gift Creative Packaging Sunglasses*1, Microfiber Glasses Cleaning Cloth*1, Glasses Case*1. It's also gift-wrapped and makes a great and practical gift for friends and family LIFETIME WARRANTY - We offer a hassle-free lifetime warranty and friendly customer service. How do polarized lenses work? Polarized lenses have a special coating that blocks horizontally polarized light. They protect your eyes from annoying glare while letting unpolarized light through. This provides better vision compared to standard tinted sunglasses. What are the advantages of polarized lenses? If you want to view objects located on the ground in bright conditions, polarized lenses allow you to see better color contrast because horizontal light waves are filtered out. Enhanced color perception can provide better visual clarity than if the eyes were overexposed without lenses to begin with. Since your eyes don't make an effort to recognize specific objects in the environment, you can use this product more often to avoid fatigue-related problems such as headaches. Polarized sunglasses protect your eyes by blocking glare reflected off water surfaces. Polarized lenses block glare from slippery roads while driving. Make sure you can read the dashboard display through the lenses. Polarized lenses are great for hiking trips that take you to exposed places like mountain tops, especially in snowy conditions.