Seat and back surface are upholstered in top grain genuine Leather. Seat cushion, back cushions and armrests are all well-padded for ultimate comfort PU-Injected foam cushions ( 4 1/2" thick seat cushion, 3" thick back cushion) are wrapped in Dacron, a synthetic silk. Frame, arms and base are made with high-Polished Aluminium. The 5-point base with tilt-swivel mechanism and pneumatic seat-height adjustment.