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3C88-3~23C98-3 - 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.

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

Proven performance at every step

A user with the C-Leg leg prosthesis walking to work outside a glass-fronted office building.
Greater Mobility.

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

The C-Leg user is sitting at the kitchen table with her friend.
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.

Now 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. A redesigned charger enables one-handed use. Plus, there’s a USB charging adapter available.

Training feature
Helpful Training Function.

A new 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 family scene in the garden: The son is spraying his father with a hose as he descends the stairs with his C-Leg.
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 now available in two colors: the original lighter Desert Pearl as well as a new 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 life, 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.

With their prosthetist’s help, users can choose between intuitive and deliberate stance functions. Intuitive stance uses subtle cues to detect whether users need support for standing or taking a step, while deliberate stance requires more conscious movements to resume flexion.

O&P professional – laptop keyboard
More Support For Prosthetists.

Featuring C-Soft Plus 1.10 software, the new C-Leg 4 offers even more preset options and video tutorials to assist professionals and users throughout the fitting process.

User Experience

C-Leg users enjoy healthy, active lives

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.

Functionality

See why more users trust C-Leg

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 real practitioner and user experiences have made C-Leg the most preferred and trusted microprocessor-controlled knee joint in the world. It’s also the most widely studied and proven. 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

Product Data

Article number3C88-3=8.5-23C98-3=8.5-23C88-3=9.2-23C98-3=9.2-2
Mobility grade2, 3, 42, 3, 42, 3, 42, 3, 4
Distal connection

Tube clamp

Tube clamp

Tube clamp

Tube clamp

Proximal connection

Threaded connector

Pyramid

Threaded connector

Pyramid

Knee flexion angle130 °130 °130 °130 °
Moisture protectionIP67 (weatherproof)IP67 (weatherproof)IP67 (weatherproof)IP67 (weatherproof)
Weight (without tube adapter)1255 g1,250 g1255 g1,250 g
Max. body weight136 kg136 kg136 kg136 kg
ColourMidnight ShadowMidnight ShadowDesert pearlDesert pearl
Proximal system height to alignment reference point26 mm5 mm26 mm5 mm
Minimum distal system height with 257/2R67 tube adapter289 / 329 mm289 / 329 mm289 / 329 mm289 / 329 mm
Max. distal system height with 257/2R67 tube adapter494 / 534 mm494 / 534 mm494 / 534 mm494 / 534 mm
Min. build height with 2R57/2R67 tube adapter297 + 9* / 337 + 9* mm294 / 334 mm297 + 9* / 337 + 9* mm294 / 334 mm
Max. build height with 2R57/2R67 tube adapter502 + 9* / 542 + 9* mm499 / 539 mm502 + 9* / 542 + 9* mm499 / 539 mm
Proximal build height to alignment reference point26 + 9* mm23 mm26 + 9* mm23 mm
Min. distal build height with 2R57/2R67 tube adapter271 / 311 mm271 / 311 mm271 / 311 mm271 / 311 mm
Max. distal build height with 2R57/2R67 tube adapter476 / 516 mm476 / 516 mm476 / 516 mm476 / 516 mm
Downloads

Documents

FAQS

Answers for you

Accessories

Compatible accessories

Prosthetic covers-3F1~51
3F1~51Prosthetic covers

Do you want a leg prosthesis that looks as inconspicuous and natural as possible? 


From day-to-day work to recreation, the functional cosmesis restores the natural volume of your leg as closely as possible. This impressive multi-part solution also integrates well with other prosthesis functions. The functional cosmesis consists of a knee part, a functional shank made of foam that can be custom moulded by your prosthetist and a functional stocking that forms the exterior finish.

Related products

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3C60Knee prosthetics

Walking with a prosthesis for the first time means building up confidence step by step. This also applies if you use other devices or generally do not move about much. You become more flexible and independent only when your confidence in the prosthesis grows.

The Kenevo puts a focus on safety. It provides support in typical everyday situations with its basic functions. Moreover, the activity modes make it highly adaptable. The Kenevo keeps pace with your growing skills, for instance during rehabilitation, and adapts itself to decreasing mobility equally well.

The new Kenevo features new functions that make day-to-day life easier and richer. They include the intuitive assisted descent of ramps and the use of an indoor bicycle (static bike). The prosthesis is easier to put on and it can be charged without removing the foam cover. The knee joint can be configured using a smartphone with the Cockpit app.

#EvolveWithKenevo

How can we help?

Get in touch with Ottobock UK by completing the enquiry form below. If your request is urgent you can call us on 01784 744900. Monday to Thursday 08:30 to 17:00 & Friday 08:30 to 16:00.