D.F.C. System is the ultimate innovation developed in the TCX® Research and Development Dept. to offer an excellent balance between flexibility and protection. The structure, made of a special polyurethane compound, offers the foot and leg to naturally flex forwards and backwards, which preventing from ankle joint twisting.The system features a PU frame attached to the boot with two lateral hidden screws positioned on the heel counter, at malleolus level. At the back of the boot, the system is equipped with two lugs that slide inside dedicated ‘safety lock’ pockets which allow a back flexibility up to 13 degrees, avoiding the overextension of the ankle joint to limit the risk of injury. The PU frame of the system is thin and shaped around the boot to offer a flat internal surface, which allows a good grip on the bike, and prevent from becoming caught on the bike while riding.D.F.C. System is engineered to also offer a superior level of protection in case of impact; the heel counter is designed to absorb impact energy and compression and it is equipped with rear and lateral slider to facilitate the natural sliding in case of a fall.