369 is an armchair by Walter Knoll with steel frame, plastic shell with foam-moulded latex upholstery and an outer layer of wadding and then completely upholstered in fabric or leather. Designed in 1956, when the experiments with new materials and the invention of plastic made this possible, its allies came from Scandinavia, the Bauhaus and the avant-garde. The armchair set flowing forms and sweeping vital lines against the straightness prevalent at the time, becoming and remaining an icon to these days.