The rigid carbon fiber insert is used for more acute injuries that need more rigidity. Injuries such as Lis Franc, metatarsal fractures, acute turf toe, hallux rigidus, and transition from walking boot to shoe. Usually athletes are started with this insert when they return to play.

NOTE: Sold as each, NOT as a pair.  The insert is flat so, it is either a LEFT or RIGHT by simply turning it over.