C-Leg 4 leg prosthesis

Benefits at a glance

More freedom of movement

Movement patterns are considerably easier for C-Leg users, even on varying surfaces such as sand, grass or gravel. The flow of smaller step sequences and the user’s gait pattern when changing walking speeds are controlled more smoothly. Even if you have never worn a C-Leg before, this technology typically makes the adjustment period quite short.

Greater mobility

Fluid movements occur first and foremost when the prosthesis joint responds quickly to different everyday situations. The resistances of the C-Leg adapt to all walking situations in real time, whether on level ground, stairs, inclines or varying surfaces. This gives you a noticeably smoother and more reliable movement pattern – and more energy for the better things in life.

Select the stance function yourself

Assume a relaxed position with the knee slightly flexed. This is especially helpful on slopes and uneven surfaces. By request the O&P professional can configure the stance function for you. With this function, the joint detects from your movement when you would like to stand in a relaxed position and when you need support for your next step.

Stumble Recovery for enhanced safety

Safety has always come first with the C-Leg. A large number of studies have proven that the frequency of falls in people with a transfemoral amputation is significantly lower with the C-Leg in comparison to conventional prostheses. This makes the C-Leg one of the most reliable leg prostheses in the world. Scientific studies show that this increases confidence in the prosthesis and that users pay greater attention to their surroundings. Stumble Recovery further enhances safety.

Comfortable sitting

The automatic sitting function provides you with crucial support. The free-swinging joint provides a relaxed and comfortable sitting position.

Smart control via app

The Cockpit app lets you operate the C-Leg directly using your smartphone – Android or iOS – and access information about the joint, such as the battery charge level. The C-Leg communicates with the app via integrated Bluetooth®.

Cockpit app

In any weather

The C-Leg is weatherproof and therefore protected against splashed water. So a sudden shower during a walk is no longer a problem.

Protection and attractive design

The C-Leg Protective Cover shields the prosthesis against impacts, environmental influences and wear and tear. It consists of a robust main Protective Cover component, a shield insert for the front side as well as a Protector foot cuff. The Protective Cover also gives the leg a natural volume under long clothing.

Proven by documented studies

The C-Leg is the most frequently fitted and most often studied microprocessor-controlled knee joint in its class. Users around the world trust the C-leg because it helps them lead an independent and self-determined life.


Intelligent system

The C-Leg technology provides intelligent control of the prosthesis for people with a transfemoral amputation and adapts it to your gait pattern in real time. Behind this is a complex sensor system that captures data in real time and recognises which phase of walking you are in, whether on level ground, going down stairs step-over-step, on slopes or on difficult surfaces such as forest floor, sand and gravel. This makes the C-Leg one of the most reliable leg prostheses. Thanks to the capacity of the prosthesis to adjust itself, the user can also negotiate small obstacles, unclear terrain or large crowds.

Technical Info

C-Leg 4 specifications

Highly stable yet lightweight carbon fibre frame

Patient weight: Max. 300 lbs/136 kg*

Weight of the knee joint only: about 2.8 lbs / 1,235 g

Height of the knee joint with adapter: between 11.2 inches / 28 cm and 21 inches / 53 cm (with torsion adapter)

Adjustable activity modes: 2

Operating time with fully charged battery: 40 to 45 hours

Maximum possible knee flexion angle without flexion stop: 130°

*All components of your prosthesis must be appropriately rated to reach this weight limit. See your prosthetist for specifics.




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