When it's mid-July, and the peloton is winding through the high-mountain stages and the heat, there's a good reason why you'll be spotting Sidi's Wire Carbon Air Shoes on your favorite pros. Sidi's top-shelf Wire Air features the unparalleled performance of its vented carbon fiber sole, which is roughly 38 grams lighter than the previous Carbon Lite sole. The new carbon sole features increased ventilation with vents that can be opened or closed (even mid-ride), granting you convenient control over the temperature. The Wire Carbon Air also offers Sidi's improved Heel Security System, which uses a fully adjustable composite band that keeps your foot comfortably in place. And for a customizable fit, Sidi redesigned the Tecno-3 Push Buckle closure system for quicker and more precise adjustments that can be made easily while you're in the saddle. Lastly, all the buckles, wires, outsole lugs, and heel retention devices are fully replaceable.