The Shimano S-Phyre RC903 PWR Cycling Shoe is engineered for peak performance and exceptional comfort. Its innovative design features a reinforced upper with a tongue, providing a glove-like fit that enhances rigidity and stability for optimal power transfer. The Race-Tuned Closure System, which combines a BOA Li2 metal dial with a power boost guide and Velcro toe strap, minimizes foot movement and maximizes energy transfer. The heel cup is equipped with anti-twist stabilization to secure your foot firmly during intense efforts and high-cadence riding. Designed with variable size perforation holes, the shoe offers excellent breathability and elasticity, accommodating a range of foot shapes. Its striking appearance is highlighted by a color-shifting crystal finish on the outsole and heel, adding a touch of flair to your ride. The ultra-stiff carbon sole and low stack height midsole ensure efficient power transfer and all-day pedaling comfort.