People who spend a lot of time sitting down in the front of an executive desk ( decision-making, managing, controlling, directing, etc.. ) and office workers in general might seem like they lead a cushy life, but the fact of the matter is, there are a lot of health concerns to be considered. If you have a desk job, making sure you have proper lumbar support in your executive chair is your number one priority. A comfortable executive office chair with high back makes all the difference when you're sitting and working for hours a day. The modern design Opera office chairs have it all: it is nice to look at, is is made from solid and exclusive materials selected by Leyform ( metal shell, mechanism, arms, leather, gas lift, castors, fabric, etc.. ) intended to last you a long time, and it will provide the back support that's so essential to your health. Synchronized mechanism. Metal framed backrest. Cold injected and fi reretardand PU padding. Polished aluminium 4- or 5 star bases. Nylon self-braking castors (Typ H).