Proven, preferred performance

Discover the new C-Leg 4 Microprocessor Knee.

Thrive with C-Leg

C-Leg: Trusted for good reason.

Since 1997, one particular microprocessor knee has set the standard for every other available option. Now, with the new C-Leg 4, our signature knee is raising the bar even higher.

It’s the one patented technology that empowers you with the proven performance you need to live the healthy, active life you want. C-Leg adapts to your unique gait pattern and walking speeds, so you can keep your focus where it matters — not on your next step, but on where you want it to take you.

Proven Performance

It’s the world’s most studied prosthetic device. Full stop.

Up to 90%

of C-Leg users prefer it to their previous mechanical prosthesis*

25 years

of continuous microprocessor knee development and user input have led to the new C-Leg 4.


fittings have helped more users regain their mobility than any other microprocessor knee.

With C-Leg, I’ve started a new chapter in my life. I used to be shy about my prosthetic leg, but now I feel strong and confident.

Royal, estate agent
C-Leg Success Stories

Why do more people choose C-Leg than any other microprocessor knee?

C-Leg has changed the lives of thousands of people just like you - and many of them have shared their stories with Ottobock. Discover how our technology has empowered them to achieve the life they want.


Courtenay is a grandfather, an avid football fan, and loves to cycle. He credits his C-Leg for allowing him to enjoy a much more active retirement and being able to do the things he loves.

With C-Leg, I’m living again - traveling, working, taking care of my home and family. I feel good!

Patricia, office assistant
Key Features

Discover how C-Leg 4 supports your active day-to-day life.

With its innovative design and exciting new features, C-Leg 4 provides a highly personalised user experience that helps you move more easily through your day and stay focused on what matters most to you.

New Colour Option

Many updates to our signature C-Leg Microprocessor Knee are based on feedback we received directly from C-Leg wearers. That’s why the C-Leg 4 is available in the original lighter Desert Pearl colour as well as a new darker shade, Midnight Shadow, which is a deep gun metal grey colour.

NHS Funding

NHS Microprocessor Knee Funding for C-Leg 4.

Ottobock has been proudly providing the C-Leg 4 to medium to highly active individuals through NHS England funding since 2016. The funding means that amputees have access to an MPK which provides the most natural walking pattern helping users improve their mobility and gain independence.

Six users wearing C-Leg's stand against a white background.

Take a closer look.

The C-Leg's legacy lives on, discover some of the new exciting and innovative features of the updated C-Leg 4 microprocessor knee in detail.


Frequently asked questions about the C-Leg 4.

Want to know more? Contact us using the form below.

*Kannenberg, A., Zacharias, B., & Pröbsting, E. (2014). Benefits of microprocessorcontrolled prosthetic knees to limited community ambulators: systematic review. Journal of Rehabilitation Research and Development. 51(10), 1469-96.

Orendurff, Michael S.; Segal, Ava D.; Klute, Glenn K.; McDowell, Martin L.; Pecoraro, Janice A.; Czerniecki, Joseph M. (2006): Gait efficiency using the C-Leg. In: Journal of rehabilitation research and development 43 (2), S. 239–246.

Hafner, Brian J.; Willingham, Laura L.; Buell, Noelle C.; Allyn, Katheryn J.; Smith, Douglas G. (2007): Evaluation of function, performance, and preference as transfemoral amputees transition from mechanical to microprocessor control of the prosthetic knee. In: Archives of physical medicine and rehabilitation 88 (2), S. 207–217. DOI: 10.1016/j.apmr.2006.10.030.