The Speed Carbon RC is a new breed of road racing shoe. Building on 10 years of R and D, we have created our fastest road racing shoe to date. A CARBITEX DFX dynamic carbon plate, Kinetic Light Foam and ER2 rocker geometry create a lightweight and efficient racing shoe that gives you back more of the energy you put in. Further, your foot is nicely wrapped up in a lightweight and breathable mesh. That means you can run faster for longer.