The Sidi Genius X Wyve shoe combines breathable mesh and TPU reinforcements to provide lightweight ventilation and improved foot stability. The two Nuun rotors and high-density midsole ensure a precise fit, while the R3CC carbon shell (stiffness index 6) guarantees a smooth power transfer and balanced comfort for all types of rides. Upper material: Technical Wyve mesh with TPU reinforcements - lightweight, breathable, and offers good grip. Closure: Two aluminum Nuun 001C rotors - precise, quick, and aerodynamic tension control. Heel: Anatomical insert made of high-density TPU - secure hold with fewer pressure points. Adjustment system: Integrated structure of the upper material - stability and support without overloading. Sole: R3CC made of carbon composite material - stiffness index of 6 for smooth power transfer and lasting comfort. Cleat adjustment: Independent adjustment for personalized alignment. Replaceable parts: Heel spikes and rotors. Millennium Fit: Same shoe size as your sneakers. The Millennium Fit is the latest innovation. This new design features a slightly wider shape that offers increased comfort and better adaptability to the foot.