The Shimano SH-RP100 Road Shoe offers an all-around performance road cycling shoe with shimano quality, comfort, and function. Features Synthetic Leather – Lighter, stronger and more durable than natural leathers Wider Cleat Adjustment – Expands range for mounting cleats Compatible with SPD andSPD-SL Comfortable fit and perfect support for pedaling Dual hook and loop straps provide reliable and secure fit Lightweight glass fiber reinforced nylon sole Indoor cycling friendly SPD and SPD-SL cleat compatible Reflective print on heel cup for improved visibility Technologies SPD-SL – The SPD-SL pedal system delivers a seamless shoe + pedal interface for more efficient power transfer under extreme pedaling loads, with a wide cleat design for stability on or off the bike. SPD – delivers greater efficiency, increased stability, and added comfort both on and off the bike in the most challenging conditions, while recessed cleats make walking easy. Shimano Dynalast – The toe-spring section of a cycling shoe plays a key role in supporting efficient pedaling. Too high, and it causes increased tension in the plantar, calf, and hamstring muscles. Too low, and you get a bowlegged, inefficient pedaling form. Extensive research by Shimano’s R&D experts has produced a superior shoe last design with an optimized toe-spring section that promotes a smoother, more energy-efficient upstroke. Built based on feedback from pro riders, Shimano Dynalast helps reduce energy loss on long rides, letting you keep more in the tank for that final sprint to the line.