This New Boss Executive Office Chair Made of high-quality Pure Leather which is comfortable and breathable. The curved design handlet give optimal lumbar support and to support your body while keeping your spine properly aligned. The unique  shape offers not only strong back support, also an elegant style to your home/office. Stainless Steel Base: The high quality stainless steel base which is only used as the base of expensive gaming chair, makes this chair the most sturdy one Relax by tilting: The tilt of the chair in an upright position at 90° by pushing the lever in; pull the lever out to unlock and recline from 90° to 125°. The user can adjust the tension of the free floating tilt to match their body weight. Max Weight Capacity: 150kg. Fully adjustable height with a 360-degree swivel offer a versatile range of motion. This chair can easily adjust the height of the seats according to human spine structures