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3C88-3/3C98-3 - Knee prosthetics

C-Leg 4

Choose the latest in proven performance.

With over 100,000 fittings worldwide, the C-Leg is trusted by more users than any other microprocessor knee in the world. It’s no wonder: Studies show the C-Leg provides the exceptional reliability and performance a user needs to focus on what really matters — enjoying a healthy, active lifestyle.

With over 100,000 fittings worldwide, the C-Leg is trusted by more users than any other microprocessor knee in the world. It’s no wonder: Studies show the C-Leg provides the exceptional reliability and performance a user needs to focus on what really matters — enjoying a healthy, active lifestyle.

From descending stairs and ramps, to navigating uneven terrain, to walking backward, the C-Leg dynamically adapts to a wide variety of everyday situations.

This legacy lives on in the C-Leg 4 update. With an innovative design and exciting new features, the C-Leg 4 provides the known reliability, next-level personalisation, and an easier, more intuitive user experience for both patients and professionals alike.

Product typeMicroprocessor
Mobility grade2, 3, 4
Max. body weight136 kg
All specifications
Benefits at a glance
A user with the C-Leg leg prosthesis walking down a staircase.
Greater Mobility.

The key to fluid movement is a knee that responds quickly to different inclines and surfaces. With the C-Leg 4, users get improved stance release and increased support for descending ramps and stairs, enabling noticeably smoother and more reliable movement.

Enhanced safety
Stumble Recovery Plus.

Stumble Recovery Plus is active at all times with the C-Leg 4 update. This ultra-precise feature automatically detects fall-like movements during the swing phase of users’ gait and activates the resistance they need to avoid a fall, recover their balance, and maintain greater stability.

A C-Leg user taps his C-Leg before exercising.
Manual locking function

With the manual locking function users can conveniently secure the C-Leg 4 in extension with a simple tapping pattern, even when using a cosmetic fitting. This is particularly helpful during sporting activities, for example.

The C-Leg user is sitting on a chair while making pottery.
Support And Comfort For Sitting.

The C-Leg 4 detects when users sit down, mirroring their speed to keep them stable and in control — even if they’re using a chair or a walking aid for support. Once seated, they can enjoy a relaxed, comfortable position with a free-swinging joint thanks to the supported sitting function.

C-Leg 4
Easier user experience.

It’s easier than ever for users to get the most out of their C-Leg. Deep sleep mode saves battery during long flights, camping, or other activities where power supply is limited. The charger enables one-handed use. Plus, there’s a USB charging adapter available.

Training feature
Helpful Training Function.

A training function provides a feedback signal after every successful swing phase initiation to support troubleshooting and gait training as users get accustomed to their prosthesis. This feature can be activated and deactivated by the prosthetist or user via the Cockpit app.

A C-Leg user pets his wet dog close to a lake.
Weatherproof Design (IP67).

With the C-Leg 4, users don't have to worry about occasional water splashes. Whether they’re walking past a sprinkler, working in the garden, or caught in a sudden rain shower, the C-Leg is designed to stay protected as long as the joint and components are dried off afterward. The C-Leg is NOT WATERPROOF.

MyMode Plus
MyMode Plus.

Now, users can easily get more support for their favourite activities. MyMode Plus offers a fantastic selection of options for work, leisure, and athletics. Together with their prosthetist, users can select two settings for easy activation in the Cockpit app or via a movement pattern.

A C-Leg user is painting her shield insert
Customisable Shield Insert.

Users can personalise the look of their prosthesis thanks to a new customisable shield insert. Not only do these robust, durable covers protect the C-Leg 4 from environmental factors or wear and tear, they also now empower users to show off their unique style with each step.

The new colour of the C-Leg 4 – Midnight Shadow.
New Colour Option.

Many of the updates to our signature C-Leg microprocessor knee are based on feedback we received from users and professionals. In fact, that’s why the C-Leg 4 is available in two colors: the original lighter Desert Pearl as well as a darker shade, Midnight Shadow.

The C-Leg 4 activates his MyMode Plus in the Cockpit App
Smart Control Via App.

With the Cockpit app, users can fine tune MyMode Plus and other settings individually, switch between MyMode Plus options, check their knee’s battery status, set their volume, track their activities, perform a knee joint self-test if needed, and much more — all via their iOS or Android smartphone.

A C-Leg user is standing in a paint shop
Stance Function Selection.

Users can choose between intuitive and deliberate stance with the help of their O&P professional. Intuitive stance uses sensor data to detect whether the user needs support while standing or taking a step, while deliberate stance requires more conscious movements to resume flexion.

A blue circle with a graphically represented prosthesis and the word pro.
More Support For Prosthetists.

The app connectgo.pro for Android and iOS smartphones and tablets makes it easy for O&P professionals to quickly and conveniently program the C-Leg for their users.

User Experience

Shima’s C-Leg 4 story

Shima's positive charisma and broad smile are simply infectious. Anyone who talks to her realizes how much joy she has in her life and what a big heart she has. Being an O&P professional herself, she takes pride in caring for each of her patients and giving them the best devices to fit their individual needs. She loves to play wheelchair basketball, run, dance and hang out with her friends. Watch the video to see how her C-Leg supports her in everything she does.

Chance’s C-Leg 4 story

Chance is a real family guy. He enjoys being together with his family and their dog. Uneven terrain, stairs and splashes of water are no problem for him thanks to his C-Leg. This allows him to focus on what’s truly important: family and friends. Watch the video and enjoy a fun day outdoors with Chance, his C-Leg 4 and dog Dolly.

Georg’s C-Leg 4 Story

Georg maintains an unwavering positive attitude toward life. In fact, he believes his amputation has created new possibilities for him, such as realising his childhood dream of skiing, discovering a passion for the javelin, and becoming a para-athlete. Watch the video to see how the C-Leg 4 supports him during sports, daily routines, and everything in between.

Rebecca’s C-Leg 4 Story

Rebecca loves to express creativity in every facet of her life. Thanks to the new custom shield insert for her C-Leg 4, her unique style and personality are always on display for the world to see. Watch the video to see how the C-Leg 4 keeps Rebecca focused on what really matters — not every step she takes, but rather where each step will take her.

Celebrating 25 Years of C-Leg

C-Leg the signature microprocessor controlled knee joint started a revolution in prosthetics. A quarter century and over 100,000 fittings later, it’s still the most popular prosthesis of its kind. See how the C-Leg keeps users moving forward with decades of innovation in every step.

Functionality

Intelligent system

Ottobock is continually developing the C-Leg to ensure users get the latest and greatest in microprocessor knee technology. The C-Leg supports users throughout the entire gait cycle, adjusting to their unique walking patterns in real time. So, whether they’re going downstairs step-over-step, descending slopes, or navigating uneven terrain, C-Leg users can truly trust their prosthesis as they move through their daily activities.

Reliability

Twenty-five years of continuous development, based on the experiences of qualified personnel and users, have made the C-Leg the most preferred and trusted microprocessor knee worldwide. It is also the most widely studied and proven microprocessor knee. In fact, 77 scientific publications featuring upwards of 2,500 subjects clearly support the benefits that C-Leg users across the globe enjoy every day.

Elegance

Thanks to innovative new developments, C-Leg 4 users enjoy more harmonious, fluid movement patterns — even when taking small steps, changing walking speeds, or navigating different types of terrain such as sand, grass, and gravel. Even users who have never worn a C-Leg are able to adjust to the prosthesis over a relatively short period of time.

Safety

Many studies have proven that users fall significantly less frequently with the C-Leg than with conventional prostheses, making the C-Leg one of the most reliable leg prostheses in the world. In addition, the new C-Leg 4 provides even greater safety and stability via Stumble Recovery Plus and increased support for sitting down.

Specifications

Product information

Product typeMicroprocessor
Mobility grade2, 3, 4
Max. body weight136 kg
Amputation levelHip disarticulation, Transfemoral amputation, Knee disarticulation
MaterialCarbon
Downloads

Documents

FAQS

Answers for you

Accessories

Compatible accessories

Adapter-2R67
2R67Adapter
The 2R67 torsion adapter minimises shear forces that occur between the residual limb and socket while walking, thereby improving wearer comfort. It provides individually adjustable torsion of max. 20° in any direction.
The 2R67 torsion adapter minimises shear forces that occur between the residual limb and socket while walking, thereby improving wearer comfort. It provides individually adjustable torsion of max. 20° in any direction.
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With the market launch of the Genium leg prosthesis, Ottobock opened up entirely new horizons for prosthesis wearers: a nearly natural gait pattern, climbing stairs step-over-step, walking backwards, relaxed standing – to name just a few examples. The benefits of being fitted with a Genium have been scientifically proven in multiple studies.The Genium has been enhanced based on human movement as the model. The result is a noticeably smoother gait and even better support and safety in everyday situations, for instance on ramps, in confined spaces or when changing walking speeds. Five individually selectable MyModes support special movement patterns at work or play.The Genium can be configured with the Cockpit app, which is now available not only for Android but Apple (iOS) devices as well.
With the market launch of the Genium leg prosthesis, Ottobock opened up entirely new horizons for prosthesis wearers: a nearly natural gait pattern, climbing stairs step-over-step, walking backwards, relaxed standing – to name just a few examples. The benefits of being fitted with a Genium have been scientifically proven in multiple studies.The Genium has been enhanced based on human movement as the model. The result is a noticeably smoother gait and even better support and safety in everyday situations, for instance on ramps, in confined spaces or when changing walking speeds. Five individually selectable MyModes support special movement patterns at work or play.The Genium can be configured with the Cockpit app, which is now available not only for Android but Apple (iOS) devices as well.