The 3R78 is focused on a robust, dust-resistant design that is resistant against environmental impacts. Single-chamber pneumatics control the swing phase Harmonious flexion and extension movements, and therefore an approximation of the physiological gait pattern, are made possible. Here the polycentric joint geometry effectively shortens the prosthesis during swing, resulting in more ground clearance and reduces the risk of stumbling. A high flexion angle of 150° leads to an increased freedom of movement. Stance phase stability even in confined areas In extension, the instantaneous centre of rotation is located above the joint and behind the load line, resulting in high stability in the stance phase. The integrated extension assist spring ensures that the lower leg of the prosthesis is always extended at heel strike and weight can be safely supported on the prosthesis side. Easy fitting without extra effort The flexion and extension dampening can be separately adjusted according to the individual requirements. A smart quick start guide included in the scope of delivery facilitates the alignment and adjustment process and reduces the working time of the prosthetist to enable a rapid fitting success.