Elite racing/custom fit. Pro-level stability, rigidity and lightweight, plus a perfect anatomical fit. Heat-moldable custom-fit technology: a shimano innovation. Custom-fit technology in heel cup stabilizes the foot. Custom-fit technology in the insole for support and comfort. Lightweight carbon fiber composite sole for strength, rigidity and maximum power transfer. Micro-adjust buckle and dual asymmetrical straps. Curved, anatomical last for natural shoe-to-foot interface. Custom-fit molding optional. Advanced stretch-resistant synthetic fabrics. Breathable, durable and super-secure. Best matched with Dura-Ace PD-7810