Project Circleg is an appropriate lower-limb prosthetic system designed for the needs of amputees in developing countries. By using recycled plastic waste in combination with simple production methods, the Circleg prosthesis can be produced locally and cost-effectively.

What makes it unique


Project Circleg is design driven and therefore developed according to the needs and circumstances of the users.


Project Circleg uses recycled plastic waste in combination with simple production methods in order to produce locally and cost-effective.


Project Circleg is based on the concept of circular economy and designed to work in a material cycle.

functionality & comfort


The adapters at foot and knee joint enable the individual adjustment to the user.


A mechanism incorporated in the knee joint swings the leg forward while walking in order to prevent dangerous trip hazards.

Protection cap

The polycentric knee joint is equipped with a protection cap, which allows a kneeling position and protects the joint from dirt.

Ankle joint

The ankle joint allows a squatting position and therefore the use of a squat toilet.

Modularity & Customizability

The modular design ensures that the Circleg prosthetic system can be individually adapted to the user in terms of size and color. This allows expressing individual personalities through the Circleg prosthesis.


Why Project Circleg is needed

high demand

35 to 40 million people globally require prosthetic and orthotic services.

World Health Organisation

The demand for affordable prosthetics is high in many developing countries, however, most of existing prosthetic systems lack in terms of functionality, affordability and availability. Not being able to walk has a huge influence on physical, psychological, economic and social aspects. Without access to prosthetics, many individuals in need are confined to their homes and live dependent, excluded lives.

Valuable Resource

72% of the worldwide yearly produced plastic packaging ends up in landfills or nature.

Ellen McArthur Foundation: The New Plastics Economy

Landfills are often found in developing countries, as they have no capacities, resources and laws to set up an official recycling system. By using locally available recycled plastic waste, Project Circleg simultaneously tackles an urgent environmental issue (plastic pollution) and raises awareness for the environment in developing countries. The use of recycled plastic waste furthermore reduces material costs by up to 50 percent and adds value to the economy by transforming waste into a tradable resource.

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Circleg Team


We are Project Circleg! A motivated team of six people with diverse professional backgrounds from design to biomedical engineering, communication and NGO management. We all share the vision of creating an impact with our skills and truly believe that Project Circleg gets better when it is discussed from various perspectives. So get in touch with us! We are keen to get to know your ideas and opinions.


Swiss Student Sustainability Challenge 2018
Winner of the SSSC 2018

Nomination for Progress Prize 2018
Top 10 at the Global Grad Show 2018 in Dubai

Falling Walls Lab Zurich 2018
Winner of the Falling Walls Lab Zurich 2018

James Dyson Award 2018
Switzerlands Winner of the James Dyson Award 2018

Award for Excellent Business Pitch
University of Zurich Innovators Camp 2018

Student Award 2018
Department Design at the Zurich University of the Arts

Young Researcher Award 2018
Institute for Design Research at the Zurich University of the Arts

  • When we want to try something real quick, we usually 3D print it. 
#3dprinting #projectcircleg #socialdesign #socialimpact #industrialdesign
  • We‘re looking into the foot today. Working with several different approaches is key for finding the very best solution. How should your foot look like?⠀
#designthinking #projectcircleg #socialdesign #socialimpact
  • 🎊🎉 It‘s our birthday! Well, sort of. Exactly one year ago, Project Circleg was exhibited at the @zhdkcampus diploma exhibition. And now the little baby is already taking it's first steps into the world!⠀
#projectcircleg #birthday #socialdesign #socialimpact
  • Not having enough resources sucks, doesn't it?⠀
Let's take care to our planet.⠀
#environmentday #saveourplanet #projectcircleg #socialdesign #socialimpact
  • Last but not least, the second founder of Project Circleg: @simonoschwald. Together with Fabian, Laura and Rahel he develops the new prototypes and when it comes to presenting Project Circleg, he's at the frontline. Apparently he likes green. And he also loves to travel! 
Photo: Lucca Barbery
#projectcircleg #socialimpact #socialdesign⠀
  • Currently we‘re working on a new knee mechanism. Did you know, that a human knee joint is quite a complex construction? Nature is a pretty clever designer, we have to admit.⠀
#projectcircleg #socialdesign #socialimpact #design #organicdesign
  • This is Lukas. He has an academic background in Public Policy as well as Nonprofit Management and is responsible for the financial part and partnerships of Project Circleg. You wouldn't believe it, but sometimes he also smiles;) Photo: Lucca Barbery⠀
#projectcircleg #socialimpact #socialdesign #newteammember #partnerships #welcome #purple ⠀
  • Developing a socket for a lower limb prosthesis means finding the perfect balance between good grip and comfort for the user. What are your current experiences with lower limb sockets?⠀
#projectcircleg #socialdesign #socialimpact #industrialdesign #productdevelopment #socialdesign #lowerlimbprosthetics

supported by

Wissenschaft.Bewegen Gebert Rüf Stiftung

«This project is directly touching the life of disabled people in Kenya. We really need it and we very much welcome you.»

Thadius Mogendi, Chairman of the Lake Naivasha Disability Environmental Group