With its cylindrical shape and frameless style, CLEAR offers the clearest and biggest field vision (210°) featuring a photochromic lens that automatically adjusts to all weather conditions. It changes from a royal blue lens in sunny conditions to a transparent purple in overcast weather within seconds. Dual-layered Grade 1 optical-quality polycarbonate lensAnti-fog and anti-scratch coating with 100% UV400 protectionOver the glasses fit & adaptable strap with silicone lining for a great fit on most helmetsPhotochromic lens VLT 16% (sunny conditions) to VLT 53% (overcast weather)Magnetic lens attachment technology that makes it easy to switch between lenses for style switches