Poliseat is a portable chair that can be shared thanks to the app of the same name on the Bovisa campus at the Politecnico di Milano. The objective, which was achieved, was to improve the quality of time spent within the university’s green spaces, which many people could not use because of the lack of public seating. The chair turns into a comfortable chair with a top and uses a sharing system similar to car sharing. A sustainable and durable choice.