A. This day-and-night cycling glasses are designed for outdoor sports enthusiasts and suitable for various scenarios such as traveling, outdoor sports, cycling, and driving. B. It features a full-frame structure, providing a stable wearing experience. The lenses have a photochromic function and can automatically adjust according to different light conditions. Whether it's the strong sunlight during the day or the relatively dim light at night, it can offer you a clear field of vision, truly enabling day-and-night use. C. The light transmittance classification of these glasses belongs to category 2 sunglasses. Although they are not polarized glasses, their UV protection level reaches UV400, which can effectively block the harm of ultraviolet rays to the eyes and provide reliable protection for the eyes. Meanwhile, they have excellent windproof performance. During high-speed sports like cycling, they can prevent sand and dust from blowing into the eyes, allowing you to focus on the sport. D. The size of these glasses fits most people, so you don't have to worry about the wearing issue. They can bring you a comfortable and safe experience in various outdoor scenarios.