ALPHA HOME Office Chair, Ergonomic Height Adjustable, Manager Chair, Ergonomic Computer Chair with Adjustable Lumbar Support, Armrest, Tilt Function, Up to 160 kg Load CapacityErgonomic Office Chairs: The ergonomic structure of the office chairs can perfectly support your waist and back, the seat height can be adjusted flexibly up and down, the cushion is comfortable and soft, suitable for people of different sizes, so you can study or work for a long time more concentrated and efficient Flexible office chair: ergonomic swivel chair is equipped with a membership cushion, which can be adjusted up or down by 6 cm. The precise