The Shimano SH-RC300E Wide Road Shoe has high-performance features and a highly adjustable fit. SPD-SL Compatible The integrated seamless midsole and upper construction set a new level of fit, stability, and lightweight performance. The off-set center flap-mounted Boa L6 dial creates a sleeker profile with quick adjustments. The surround wrapping upper structure reduces overlap and provides a glove-like fit. Rubber XC racing pattern outsole promotes stable pedal engagement and secure walking grip. The Low stack height midsole stabilizes the foot and maximizes power transfer efficiency. The perforated synthetic leather composite upper enables superior fit and breathability. The Lightweight glass fiber reinforced nylon sole is stiff and helps transfer your power directly to the drivetrain.