The Shimano RC503 Road Cycling Shoes combine high-end performance with sleek comfort. Featuring the BOA® Fit System, carbon-reinforced midsole, and a seamless upper, these shoes deliver powerful efficiency, a glove-like fit, and all-day stability. Built with 23% recycled materials, they’re as sustainable as they are fast. Key Features BOA® L6C Fit System with SHIMANO-engineered lace profile for precision fit Carbon fiber reinforced nylon midsole for efficient power transfer Seamless midsole and upper integration for superior comfort and stability Low stack height midsole to stabilize the foot and optimize power Surround-wrapping upper for a glove-like fit with reduced overlap Sleek perforated synthetic leather upper for breathability and style 23% recycled material in toe box and midsole (by weight)