You must first understand the importance of riding glasses: 1. Polarized lenses can avoid the interference of light and improve the safety of riding. 2. The speed of the road bike is relatively fast during the riding process, and it is inevitable that some flying insects or some sand will fly into the eyes, causing accidents. Compared with ordinary eyes, riding goggles fit the face better and have stronger protection ability. 3. The speed of road vehicles is easily 30km/h, and the windproof function is also very important. 4. In the evening, the color of the lenses of the glasses allows us to see clearly the road conditions ahead. Time of use: According to whether you are riding during the day or at night, it is best to prepare both, polarizing lens during the day and highlighting lens at night.