SHIMANO 2016 Men's Pro XC Custom Fit Mountain Bike Shoes - SH-XC90B Synthetic Heat moldable Custom-fit Technology on upper and insole ensures a performance enhancing fit Low-profile micro-adjust buckle securely holds foot with impact reduction Supple, lightweight, comfortable with excellent elasticity Rovenica ultra-fine fiber synthetic leather Ultra-stiff carbon fiber reinforced midsole and carbon fiber composite outsole plate Lower stack height provides superior energy transfer and lower center of gravity