FlexLock System: Adjustable boot flex, LockOut of the ankle movement.Force Reduction: LockOut ankle movement gives: Up to 37% reduction of ankle forces, up to 35% reduction of forces to the knee.Outstanding first-class fit even for wide feet.Ankles: 3D-shaped impact foam over ankles, heel grip ankle design.Toe-Box: Low-profile, gear shift friendly shape.Sole: DualZone hardness, extended foot peg riding zone for arch and on the blade riding style, steel shank reinforced and CE certified.Cuff: SlideLock system, Auto-locking, one-way sliding closure.Bike Grip: Flat and grippy bike side of the boots for great bike feel.Buckles: Forged aluminum, over-locking function.Inner Liner: Breathable mesh 3D liner with anti-slip reinforcement for zero heel lift.CE tested and certified as: prEN 13634: 2017.Replaceable sole.