Ultimate fit and performance for maximum power transfer! Advanced construction with Energy Full Carbon SLR Outsole and the Energy Frame Carbon to transfer every watt into speed while the Ergo Fit 3D Carbon Insole and Ergo Lite Upper will ensure optimal comfort. Full-carbon outsoles that deliver the perfect combination of stiffness and low weight to ensure all your energy is turned into forward momentum. You'll love the multi-density Ergo Fit 3D Carbon insoles that mold to the shape of your feet and damp vibrations with elastomer inserts. The fit is enhanced further by the Energy Lock heels that prevent slippage for maximum pedal power. Plus, these smart shoes have customizable closure strap systems, ergonomic tongues and seamless, carbon-reinforced uppers for added comfort as well as reinforced toe caps for protection and durability. (Note): These shoes accept cleats with the Look/SPD-SL bolt pattern.