DXRacer Boss Series Big and Tall Chair DOH/BF120/N Office Chair Comfortable Chair Ergonomic Computer Chair DX Racer Desk chair (Black/Black) Ergonomic design-- more efficiently and comfortably, Free bonus: lumbar cushion Widest seat for big boy, Patent race car seat breathable material: Leather Style Vinyl Extra higher backrest to save neck and spinal,Flexible seat back with adjustment 4D straight armrests protect shoulders and wrists Lifetime warranty on frame, 24-month warranty on parts 4D Straight Arms Heavy Duty Tilt Mechanism Strong Aluminium Base Leather Style Vinyl 3&#034; PU Casters