About the Shimano RC5 Road Shoe The Shimano RC5 road bike shoes are designed for speed. Their aerodynamic design with high-quality fabrics, a feathery light & fibreglass reinforced nylon sole & a precisely adjustable BOA dial provide maximum power transfer & constant ventilation on exhausting sections. Key Features Light, fibreglass reinforced nylon sole for maximum power transfer. Precisely adjustable BOA dial with additional Velcro for precise adjustments while riding. Padded asymmetric ankle collar & sidewall sole for protection. Precise BOA fastening system. Cycling Shoes Buying Guide