TÜFF-GRÜN was a public art project proposal for the soon-to-be-built schoolhouse Tüffenwies, located in Grünau, a small neighborhood in the city of Zürich. As one of six finalists, Matesic developed and presented TÜFF-GRÜN, an art project that would create social happenings and relational situations using four cargo bikes, whose boxes would be deigned and built by the students of Tüffenwies. The four cargo bikes would have been available to "rent" (for free) to both Tüffenwies and Grünau communities. The project would have taken place from 2029 - 2033 but was unfortunately not selected, therefore never realized.