Consider the Sphaera Slash glasses Tour de France your permission to surpass any limit. The result of decades of research with athletes, Sphaera Slash has been designed with an alternative "slash" lens shape to help reduce impact with the cheeks and optimize sports performance through a wide field of vision and a lightweight O Matter frame. The front air intake on the frame provides improved airflow while the Unobtainium® nose pads and printed ear socks offer a non-slip grip for effortless use with hats and helmets. To experience enhanced colors and contrasts wherever you go, Prizm lens technology provides the details.