The cyclist is primarily looking for comfort and protection, so he or she is looking for cycling glasses that are practical, light, wraparound and protective. Cycling glasses differ from other types of sports glasses for: The LENS It is often very wide and unique, and has a curved shape to offer excellent visibility and protection to the entire field of vision. In addition, to meet these two fundamental requirements, it is a good idea to choose glasses that are equipped with UV filters and made of polycarbonate material. Cyclists often choose photochromic lenses, which can automatically adapt to different light conditions by darkening or brightening, or polarized lenses, which can shield more light and eliminate glare on reflective surfaces. Finally, the best glasses have unbreakable, wear-resistant, water-repellent and anti-reflective lenses. The FRAME Unlike normal sunglasses and/or prescription frames, the frame of cycling glasses is made of polycarbonate plastic. This provides greater comfort and flexibility, a better fit without creating excessive pressure and less weight. The frame of cycling glasses must also have a ventilation system to prevent the lens from fogging up, which can be a very dangerous situation if it occurs while cycling.