Day and night sport glasses: Photochromic lenses adjust based on sunlight and UV exposure, darkening from light yellow to provide optimal clarity in changing light conditions. Unlike standard sunglasses that remain dark, these lenses automatically adapt when moving indoors or into low-light environments, ensuring clear and comfortable vision for safer driving and everyday use. UV400 anti-UV polarized lenses: Feature a 100% UV400 protective coating that blocks harmful UVA and UVB rays. Polarized TAC yellow lenses reduce glare from roads, water, snow, and LED lights from vehicles, enhance contrast in dark areas alongside roads at night, and improve visibility during rainy or foggy conditions, delivering a wider, clearer, and safer field of view. Sturdy and durable flip-up clip: Precision-engineered spring bridge ensures smooth, reliable, and long-lasting flipping action without breakage or sticking. Each clip arm includes a rubber sleeve to prevent slippage and protect your primary eyewear from scratches. The clip can be easily flipped up when not needed, eliminating the need to remove it, while the streamlined design avoids obstructing peripheral vision. Ultra-lightweight design: Weighs only 8 grams, providing a nearly weightless feel for all-day comfort. Ideal for use over prescription glasses without the need to carry multiple pairs.