Ergonomic Office Chair, Fully Mesh Office Chair with Lumbar Support, Adjustable 3D Armrest, Headrest, Large and High Swivel Computer Chair (Effen - White)Full lumbar support and adjustable seat depth: This comfortable ergonomic office chair for home with split backrest provides elastic adaptive full lumbar support, prevents waist delivery and effectively relieves lower body pressure. The seat height can be increased or lowered and the seat depth can be adjusted forward or backward to make the seat fit users of different lengths. The waterfall design meets the natural placement of the legs, improving