The Torsion Control System® offers an excellent balance between flexibility and protection. The structure fully carries out the main function of T.C.S.®, which allows lateral and longitudinal movements of the ankle within its physical limits, preventing excessive torsion and the risk of fracture to the joint. The system has two main elements: a body and heel in triple-injection polyurethane, both are sewn to the upper and connected by two lateral and one posterior flexion points. This structure is less bulky and offers the rider greater adherence to the bike without running the rick to becoming caught on anything that protrudes from the body. These structural features also help make the boot lighter.