The shimano xc51 spd mtb shoe has a range of great features that will give you competition quality performance the tough synthetic upper is incredibly durable while the low profile amour provides great protection to relive any tension during the push off motion this shoe has a specially designed cross x strap with the micro adjust buckle to securely hold your foot in place these shimano mtb shoes also optimize the energy transfer to the pedal thanks to the stiff reinforced glass fibre s