The Malleo TriStep is an ankle orthosis to treat injuries of the upper and lower ankle joint phase-adapted. Gradually the degree of stabilization is reduced up to that point the patient achieves sufficient mobility and stability. By removing the stabilization elements (foot shell and stabilization strap) in three steps the Malleo TriStep adapts to the three phases of healing. In just a few steps the orthosis is easy adaptable to each healing phase.