C-Leg 4

Reclaim your determination.

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.


Please download file:

Information for users

This brochure provides you as the user with complete information about the C-Leg prosthesis.

Please download file:

Instructions for use for users

This product information is intended for users of the C-Leg.

Please download file:

Information for technicians

In this brochure, you’ll find everything that you as a technician need to know about the C-Leg.

Please download file:

International C-Leg studies

Learn more about the C-Leg prosthesis from international studies.


  • What benefits of the C-Leg are proven by scientific studies?

    The advantages of the C-Leg technology have been investigated in detail during numerous scientific studies. Among other things, these studies have proven that the frequency of falling is much lower with the C-Leg compared to other leg prosthesis systems. In addition, the user does not have to concentrate on the C-Leg all the time, but can move more freely on a day-to-day basis. The studies also show that C-Leg users have more confidence in their prosthesis, are able to boost their activity level and consume less energy while walking. They are able to cover longer distances with it.

  • Where can I get a C-Leg?

    You can obtain the C-Leg from a medical supply company. Certified medical supply companies are found under (insert address). A qualified orthopaedic technician will advise you and adapt the prosthesis to your individual needs.

  • Can I just try out a C-Leg leg prosthesis system in the situations that are part of my everyday life?

    Many practitioners offer a trial fitting. Just talk to your orthopaedic technician. The trial fitting takes place over a predetermined period of time and is monitored by Ottobock when needed.

  • What is included in a prosthetic fitting?

    A prosthetic fitting includes all components from the foot to the knee joint system, including the socket, which will be customised to your individual needs by your orthopaedic technician. Of course the assembly and setup of the system are also included, as well as regular service inspections during the entire period you use the C-Leg.

  • What happens when the battery is drained?

    A vibration message reminds you in time when the battery gets low. When the battery is drained, the C-Leg automatically switches to safety mode so that stance phase resistance remains activated.

  • Can I shower or go swimming with the C-Leg?

    No. The C-Leg prosthesis is weatherproof and therefore ideally suited for various everyday situations.

  • How long does it take to learn how to use the C-Leg?

    Many users are able to walk down stairs step-over-step on the first day with the C-Leg. On the other hand, it can also take several days or weeks until you have internalised using and walking with the leg prosthesis system. This depends on the individual since everyone is different.


Similar products