Features such as the Twenty Carbon Composite sole ensure ideal power transmission, while the Politex upper material glides through the wind with little resistance. The Tecno-3 locking system ensures excellent pressure distribution over the entire foot and the optics do the rest to emphasize its demand for high speed. SIDI technologies: NEW: Road Twenty Carbon Composite Sole High quality carbon fiber reinforced nylon sole in carbon look. The addition of carbon results in excellent strength with optimal comfort in the entire foot area. It has a non-slip, replaceable heel made of polyurethane for comfortable walking. With alignment scale for optimal positioning of the pedal plates. Compatible with all common racing bike pedal systems and in a brand new design for 2020.