Post-operative therapy of the knee, hip and foot, whenever rotation control of the lower limb is necessary (neutral position, internal or external rotation). As a splint for the positional control of the lower extremity in patients bed-ridden for long periods of time (intensive care unit). As a system to prevent deformities in bedridden patients (prevention). Hemiplegia. Paralysis of lower limb. Chronic pain of the plantar fascia (plantar fascitis).