Zózimo, RicardoSalgueiro, ToméRuprechter, Paul2023-07-212023-07-212023-01-102023-01-10http://hdl.handle.net/10362/155653PSARI, a project to collect old, worn-out wetsuits and transforms them into new products to reduce neoprene waste, started its ideation phase one semester prior to this paper. The work project followed The Lean Startup framework by Eric Rise to test and validate key dimensions of the business model. Although the production and selling of the new products made from old wetsuits were successfully validated, four of the five collection streams failed to reach the predetermined target. As a result, PSARI will pivot the way the material will be collected while continuing to test and develop its sales channels.engRecyclingUpcyclingWetsuitsWaste reductionCircular economySdg 12Sustainable consumption and productionmaster thesis203311124