The Mesh Ergonomic Office Chair - Black, comprehensively upholstered with mesh, is an excellent choice for those who work for a long time at their desks.350 Nylon Base Mesh back and seat Height & Angle Adjusted. Armrests with soft PU pads Height Adjustable Lumbar Simple Synchro Mechanism (one locking position) 60R PA Black Castors 120kg Weight Limit Product comes flat pack and requires two person assembly