Proven, preferred performance

Discover the new C-Leg 4 Microprocessor Knee.

Ready for your free trial?
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 personalized 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 color option

Many updates to our signature C-Leg Microprocessor Knee are based on feedback we received directly from users. That’s why you can now get the C-Leg 4 in the original lighter Desert Pearl color as well as a new darker shade, Midnight Shadow.

Know the difference

C-Leg: Trusted for good reason.

Since 1997, one microprocessor knee technology has set the standard for every other available option. And now, with the newest 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.

Get a closer look

See some of the new features of the updated C-Leg 4 microprocessor knee in detail.

Book your free trial

See if C-Leg 4 is right for you.

  1. Reach out to request a free trial. There’s no commitment needed to try out C-Leg!
  2. We’ll get in touch to schedule a personal consultation with an expert prosthetist.
  3. During your trial, your prosthetist will determine if C-Leg meets your needs.

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
C-Leg success stories

Learn why 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.

The C-Leg has improved my life tremendously.

After losing his leg in a motorcycle accident, Brandon recovered from the traumatic experience with the support of his family, friends, and fraternity brothers. He went on to found The Mind Clothing, a fashion brand that harnesses his unwaveringly positive spirit.

In his C-Leg 4, Brandon leans on a rail overlooking water and the city
In his C-Leg 4, Brandon leans on a rail overlooking water and the city

FAQ C-Leg 4

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

*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.