FEISEDY Women's Driving Sunglasses, Polarized, Photochromic, and Color-Changing, UV400 Protection, Men's Sunglasses for Cycling, Fishing, Baseball,

Lens height: 48mm [Photochromic Lenses] Photochromic lenses change color depending on the intensity of UV rays from sunlight. Please note that color change and photochromic performance may be weaker in places with weak UV rays, such as offices, indoors, or on cloudy days. Please check the included UV lamp (blue light) and photochromic instructions for photochromic performance. [Note] Photochromic lenses change color depending on the intensity of UV rays from sunlight. Please note that color change and photochromic performance may be weaker in places with weak UV rays, such as offices, indoors, or on cloudy days. Please check the included UV lamp (blue light) and test card for photochromic performance. [High-quality Polarized Lenses] These multi-layer lenses minimize reflections and glare, providing a clear view. They also eliminate glare from reflected light from the ocean and rivers, making them ideal for fishing. [Lightweight Design] The frame is made of a lightweight and flexible aluminum-magnesium alloy + TR frame material, weighing just approximately 20g!