The Jawbreaker with extended field of view in the upper peripheral region optimize for cycling offers Switchlock™ Technology for easy lens changing plus temples that adjust to three different lengths for helmet compatibility, Jawbreaker™ became the ultimate sport design. Prizm™ is a revolution in lens optics built on decades of color science research. Prizm™ lenses provide unprecedented control of light transmission resulting in colors precisely tuned to maximize contrast and enhance visibility.