Outstanding comfort with first-class fit even for wide feet. Closure: SlideLock system, Auto-locking one way sliding closure for great seal at top of boot. Polymer composite buckles with Over-lock system and stainless steel base. Bike Grip: Inside of boot is flat and grippy for great bike feel. Toe-Box: Low-profile, for easy gear shifting. Ankles: Heel grip ankle design for stability when riding on your toes. Sole: DualZone hardness. Extended foot peg riding zone for arch and on the toes riding style. Steel shank reinforced and CE certified. Inner Liner: Breathable mesh 3D liner with no-slip reinforcement for zero heel lift.