UV Protection: Blocks 100% of harmful UVA and UVB rays (look for UV400 certification).Lens Categories: Lenses are graded from Category 0 (clear) to Category 4 (very dark) to measure light absorption and glare reduction. Category 3 is the most common for bright outdoor days.Polarization: Filters horizontal light waves to reduce glaring reflections from water, snow, or roads.Frame Materials: Available in lightweight polymers, durable metals, and eco-friendly bio-based polyamides. [1, 2, 3, 4]If you are looking to buy a pair, tell me:What activity will you use them for (driving, hiking, fashion, sports)?What is your preferred frame shape or style (aviator, square, oval, wraparound)?What is your approximate budget?I can recommend specific options for you
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