The KWART is a comfortable design chair designed by Ton Haas. With its airy seat and strong construction, little material is needed to produce this chair and it is light in weight. The KWART can take a beating and is ideal for busy and frequently used areas such as canteens and informal spaces, but also for the home or patio.

Lowest eco-footprint!

In June 2021, an independent agency gave KWART an LCA of 0.25. This makes KWART by far the chair with the lowest eco-footprint currently available on the market. This is partly because the chair is produced in the Netherlands from fully recycled plastic. Moreover, Circuform uses a deposit for this chair, which is paid back when the chair is returned. Regardless of the condition of the chair. We reuse the plastic in our production process, and so the circle of the KWART is complete.


Article             Color                                       

4410-WT        signal white (ral 9003)        

4410-GR        platinum grey (RAL7036)   

4410-BL         graphite black (RAL9011)   

About the designer

Ton Haas’ products are characterized by their respect for the user, translated into clarity in form and material. His work shows great diversity in subject, function and execution.
After studying at various academies, including the Academy of Fine Arts in Arnhem and Kingston Polytechnic in London, Ton Haas was co-founder and partner of several industrial studios. As a guest lecturer, he has been affiliated with numerous educational institutions over the years, was appointed to numerous design bodies and juries, won prizes and had his work exhibited in museums in various countries.

In addition to his industrial work, Ton Haas is interested in working with craftsmen all over the world. His work is inspired by roots design from Africa and Latin America, to high-tech engineering from more industrialized countries.


Our brochure of KWART is available here.

Do you want to use KWART in your interior design? Download 3D files (Dutch) here.

You can easily download product photo’s here in one go. If you need photography in higher resolution, please contact us.

In this report you can read more about the calculation of environmental costs (LCA).