Inspired by the Speedcraft's legendary success on cycling's biggest stages the S2 is 100% speed that has been newly refined for everyday sports performance. Our innovative frame geometry and signature interchangeable lens tech has been tuned for riding at any level. S2's laser-etched edging provides the look of a full frame in a rimless cylindrical shield for extended vertical visibility and peerless comfort. High-impact resistant and lightweight polycarbonate lenses 5.5-base cylindrical shield lens for increased peripheral view and protection 360 degree visibility for unobstructed views and optimal field of vision Interchangeable scratch-resistant lenses provide 100% UV protection Lower air scoops to increase ventilation while reducing moisture on the lens HYDROILO lens treatment repels water dirt and oil Durable flexible and lightweight TR90 frame Ultra-grip rubber nose pads and tips for a secure fit no matter how much you sweat Also available with contrast-defining HiPER lens and photochromic options Interchangeable lenses Clear Lens: Filter Category 0 Light Transmission 93%