Inspired by Speedcraft\'s legendary success on cycling\'s biggest stages, S2 is 100% speed that has been newly refined for everyday sports performance. Our innovative technologies and signature lens have 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 360 degree visibility and comfort. Cylindrical shield offers unobstructed view 5.5 base ensures superior fit HYDROILO lens coating repels oil and water Ultra-grip rubber nose and temple tips Also available in HiPER lens technology Filter Category 2 Light Transmission 21% Clear Lens: Filter Category 0, Light Transmission 93%