In the office, you spend long hours sitting at your computer, which can have a negative effect on your back. You should therefore pay enough attention to selecting a high quality office chair. OKLAHOMA is a great choice! It boasts great ergonomic features and a synchronous mechanism with adjustable setttings. The chair has a breathable backrest and headrest. Lumbar adjustable backrest. Vertically and horizontally adjustable armrests with a soft touch pad. Polished aluminium base.