The high back office chair is perfect for working mode, you will feel comfortable even after sitting for 4-8 hours. The design of the breathable mesh office chair and high-density sponge provides cool and comfortable back support, allowing long hours of relaxed sitting without back sweating. The base of the chair is made of a very sturdy high quality aluminium alloy, the black office chair adopts smooth and silent double piece roller wheels, which move very quietly even on the carpet and without damage to the wooden floor. The maximum capacity of 150 kg. The 3D adjustable arm rests can provide comfortable arm support forwards and backwards, up and down and sides, which can provide comfortable arm support at any time and in any posture, greatly reduce pressure on arm blood vessels and improve blood circulation.