The sack-symbol of design design design of the last fifty years in Italy. An informal, versatile and subversive seat for home environments: Sacco - in the variant with coating vip fabric - is an armchair made of polystyrene balls with an incisive style pop pop pop designed by Piero Gatti, Cesare Paolini and Franco Teodoro for Zanotta - known brand new italian: the three young designers decide not to conform to the canon instead to present the most famous destructured armchair ever, that wins the Compasso D'Oro in 1972 and that is exposed to the MOMA of the Big Apple.