Shimano 2015 Men's XC Racing Performance Mountain Bike Shoes - SH-XC61L (Black - 48) Synthetic UPPER: Tough synthetic leathers provide great protection, excellent durability Low-profile micro adjust buckles Cross X Strap is optimized for relieving tension on top of foot during push off motion LAST: Shimano Dynalast XC secures the foot into the ideal ergonomic position for a more efficient upstroke SOLE: XC race specific outsole is lightweight, stiff and combined with an lower stack height providing superior energy transfer and efficiency