Avio Compact 3 Seat Sofa by Piero Lissoni for Knoll International. This a compact version of the Avio 3 seat sofa which can be seen below. Avio is constructed around an elegant load-bearing structure, a steel beam that acts as a spine for seats, backs and tables. The framework translates into a versatile system that can generate many configurations. Various options for finishes, leathers and fabrics available - contact the store for more information.