The 5.5 FlexLock boot is designed with rider comfort and protection in mind. The FlexLock system reduces forces to your ankles and knees by allowing your ankles to flex sidewards slightly before locking out. The SlideLock auto-locking one way sliding closure system makes it easy to close the boot with gloves on and provides a great seal. The flat and grippy interior of the boot enhances bike control and feel, and 3D-shaped impact foam over the ankles delivers added protection. A breathable mesh liner and anti-slip reinforcement prevent heel lift, maintaining comfort and stability throughout the ride.