Project Circleg is a low-cost prosthetic leg system designed for the needs and circumstances of amputees in less developed countries. By using recycled plastic waste in combination with simple production methods, the Circleg prosthesis can be produced locally and cost-effectively.

What it makes 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’s system is designed to work in a material cycle. This enables a lasting preservation of value of the Circleg prosthesis.

high functionality


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 Circleg prosthesis is designed to be fully modular in order to repair or exchange broken parts. In addition it also allows the individual colour design of the leg prosthesis and therefore the possibility for the users to express themselves through the Circleg.


Why Project Circleg is needed

high demand

35 million people in the world need prostheses or orthoses.

World Health Organisation

The demand for low-cost leg prosthesis is high in many «less developed countries» (LDCs) and the existing prosthetic systems lack in terms of functionality, affordability and availability. Not beeing able to walk has a huge influence on physical, psycological, economical and social aspects. Many amputees are excluded from society and are not able to get a job and gain an income for their families.

Valuable Resource

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

Ellen McArthur Foundation: The New Plastics Economy

Such landfills are often found in less developed countries (LDCs), due to the lack of official recycling systems. As industrial designers we are driven by the notion of using plastic waste as a resource for meaningful products. Therefore the Circleg prosthesis is made of recycled polypropylene (PP) post-consumer plastic waste, which cuts the material costs down to 50%. It is reinforced with glass fibres to create a composite material that meets the high-performance requirements of a leg prosthesis.

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We are Fabian Engel and Simon Oschwald, the founders of Project Circleg. As industrial designers we are driven by the notion to have an impact with our skills. We 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

  • Soon we will be exhibiting Project Circleg in this cool location and going to celebrate technology for the good! On 15th December 2018 the first Red Bull Basement Festival will take place in Switzerland. Project Circleg is part of it. Come by at Kraftwerk Zurich and visit us at the full day festival.

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#techforgood #basementfestival #kraftwerk #projectcircleg #exhibition #zurich
  • We had a great day at the studio filming for an upcoming surprise! Big up to Pixel Love for their amazing work.

#staytuned #filming #upcoming #surprise #projectcircleg #pixellove
  • Wooooow! First place at the Swiss Student Sustainability Challenge! 🎉🎉🎉🎉if you wanna find us, we are celebrating!

#projectcircleg #sssc #winner #wooooow #zhdk #industrialdesign #socialdesign
  • The @globalgradshow in Dubai was a blast! We feel blessed to have met so many passionate designers from all over the world. Many thanks for your feedback and the inspiring conversations! The journey of @projectcircleg continues, so stay tuned and follow us! 
#globalgradshow #exhibition #dubaidesignweek #projectcircleg #blessed #thankyou
  • We’re proud and happy to be among the 10 finalists of this years @globalgradshow! 
#ggs218 #finalist #honored #projectcircleg #dubaidesignweek
  • Wow! Project Circleg is on the shortlist for the Progress prize at this years @globalgradshow . The Progress prize is an international award that celebrates the next generation of design. Selected by a jury of design and technology experts. Stay tuned for tomorrows award ceremony. Woop woop!

@industrialdesign_zhdk #GGS2018 #finalist #shortlist #projectcircleg
  • Overview of @globalgradshow at @dubaidesignweek. So many exciting projects in one space. Looking forward to the coming days!

#ggs2018 #overview #projectcircleg #dubaidesignweek
  • What a great show! We’re in Dubai exhibiting Project Circleg at the @globalgradshow at @dubaidesignweek!

#greatshow #niceweather #hothothot #projectcircleg #ggs2018 #dubaidesignweek2018 #staytuned

supported by

«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