UHUKO Metal Sunglasses for UV400 and Outdoor Sports Sunglasses Aluminum Ultra-Polarized + Ultra-Lightweight (25g) Driving, Protection, Golf, Fishing,

👓【Fast Photochromic Lenses】: Photochromic sunglasses change color depending on the intensity of UV rays. They're UV-sensitive glasses that gradually tint the lenses when exposed to sunlight outdoors, then gradually lighten when indoors. The lenses are made with a mixture of halogen and silver. When exposed to UV rays, the halogen and silver break down, darkening the lenses. This chemical transformation results in photochromic sunglasses. Please note that the lens color change takes longer when exposed to weaker UV rays. 👓 [Minimize visual fatigue] The multi-layered lenses provide a clear view and block out excess light that can obstruct your view in various situations, such as the sea, rivers, and reflected light from glass, providing a high-definition view while also significantly reducing eye fatigue. 👓 [Stylish, Beautiful & Ultra-Lightweight Aluminum Magnesium Alloy] The ultra-lightweight frame is made of durable and impact-resistant aluminum magnesium alloy, weighing just 25g. It is stress-free to wear for long periods of time and is comfortable to wear, as if you're not even wearing anything. It is stylish and cool in terms of fashion. 👓 [Clear Vision with Extreme Polarization] The sunglasses' excellent polarization function makes them ideal for driving, traveling, resort trips, golf, piloting, motorcycling, mountain climbing, fishing, trekking, skiing, and other leisure activities. 👓【Caution】When purchasing photochromic sunglasses, please be aware that they will not change color in a car. Photochromic lenses change color depending on the strength of UV rays. Automotive glass has UV protection and the lenses are not sensitive to UV rays, so they cannot change color. Outdoors, the lenses will change color depending on the strength of the sun's UV rays. Please be aware of this. 👓 [Reliable Quality Guarantee & Gift Packaging Included] If you have any problems with your product within 180 days of purchase, we will respond to your request. Gift packaging includes a dedicated sunglasses case, polarized card, and cloth, making it a trendy gift. Photochromic sunglasses