The Shimano RC702 Road Cycling Shoes feature an ultra-rigid carbon sole with a stiffness index of 10, providing excellent power transfer and a minimal stack height for enhanced comfort and efficiency. Despite the stiff sole, Shimano's revised Dynalast system is designed to match the anatomy of your foot, ensuring comfort. An integrated heel stabilizer keeps your foot in the optimal position, while a wider cleat adjustment system eliminates hotspots.