Rebecca walks down a slope with her C-Leg Microprocessor Knee in the Stance Phase.
Rebecca walks down a slope with her C-Leg Microprocessor Knee in the Stance Phase.
Rebecca walks down a slope with her C-Leg Microprocessor Knee in the Stance Phase.

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

Patricia, office assistant
Patricia walks across a bridge in her C-Leg 4 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
Royal stands outside wearing her C-Leg 4 Microprocessor Knee
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.

A man stands in the grass wearing his C-Leg 4 in the new Midnight Shadow color

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 color as well as a new darker shade, Midnight Shadow, which is a deep gun metal grey colour. The Volcano Shadow colour is no longer available.

Get a closer look.

See some of the new 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.