"The PU leather ergonomic office chair is ideal for prolonged sitting, maximum lumbar support with its 4-way tilt adjustment with tension control. With its adjustable arms and headrest, & plenty of cushioning, you will find that this chair not only looks great, but it also feels great! Features Aluminum 5-star base PU leather Seat height adjustment Seat pan slide Height adjustment of the lumbar support pad backside molded foam density gas lift, Armrest Measurements 57x57x98 -106cm "