Synchwire is a monofilament composite material that has revolutionized how the upper portion of a cycling shoe can fit support and enhance the overall performance during pedaling efforts. And the Giro Cadet delivers high performance and value thanks in no small part to the one-piece Snychwire main body which Giro thermobonds to provide comfort and stiffness for indoor and outdoor cycling. The lightweight composite receives enhanced ventilation via laser perforations making it ideal for warm indoor training and spin class sessions. At the same time a team-up of a strong Boa L6 dial and hook-and-loop strap secures the fit and offers micro-adjustments as needed.As you mash down on the pedals sole flex is a primary concern. The carbon fiber reinforced composite sole transfers power effectively into the pedals to make sure you're hitting the target watts during the interval sessions. And the sole has 2-bolt and 3-bolt cleat compatibility meaning you'll be able to utilize a variety of pedal options to suit your needs and maneuver the ever-changing landscape of pedals in cycle-training classes.