Where once there was Velcro and laces to close a shoe, now there is Sidi's Tecno 3 Buckle. The Tecno 3 Buckle is a precision ratchet closure mechanism that allows for independent micro-adjustment to obtain the perfect fit every ride. While the wire closure might give the shoe its name, that is not the only thing that provides the shoe's legendary performance. The Vent Carbon Sole is a masterpiece, constructed of T700 carbon fiber in a 3k weave pattern that provides stiffness for improved power transfer without added material or weight. To add to its performance and comfort, the Sidi Wire Carbon comes with Sidi's Adjustable Heel Security System that prevents heel slip while riding. The microfiber upper is light and breathable, adding to the comfort already created by the padded tongue and Sidi's Soft Instep Closure System. These shoes come with Sidi's Comfort-Fit insoles with memory foam for lightweight support and increased comfort. Perfect for all seasons, these shoes comes with vents