Giro: THE GIRO PROLIGHT SUPERNATURAL FIT KIT OPTIMIZES COMFORT AND EFFICIENCY WITH CUSTOMIZABLE ARCH SUPPORT. THE ULTIMATE UPGRADE FOR YOUR SHOESFootbeds are a critical component in the fit, comfort, and stability of your cycling shoes, but they do pack out over time. That's why we recommend replacing them every season or two, to maintain optimal support and keep your shoes feeling fresh. The Giro Prolight SuperNatural Fit Kit combines our cycling-specific footbed design with three different levels of arch support (S, M, and L), so you can custom-tune the fit and support for greater comfort and pedaling efficiency. This kit provides the same comfort and support as our standard SuperNatural Fit Kit, but at only half the weight, making it the ultimate performance upgrade for almost any cycling shoe! The footbed and arch support are made from expanded polypropylene to minimize weight while providing cushioning from vibration and pressure, and the X-Static top sheet offers permanent anti-static and antimicrobial performance to reduce potential hot spots and odours. The thin profile of the footbed allows for optimal heel lock and helps to maintain the true fit of your shoes compared to bulkier, heavier aftermarket orthotics. So if you're serious about comfort and performance, this is one of the best upgrades you can make for the money. SPECSCLEAT COMPATIBILITY 3-BOLT ROAD OR PELOTON™