STRUCTURE: metal. BACK AND ARM UPHOLSTERY: multy-density cold-expanded polyurethane. SEAT UPHOLSTERY: multi-density non-deformable polyurethane (HR35-36 + NA40031 + NA3615) covered with synthetic lining 180gr. SEAT HEIGHT: 45 cm FEET: metal, finishes: titanium or black nickel or varnished micaceous brown or oxy grey.