Backrest: Constructed with a breathable mesh material designed for ventilation during long working hours. It often features a distinct double-spine or split-back design for lumbar support.Seating: A padded seat cushion typically upholstered in black fabric or mesh for comfort.Adjustability:Headrest: Includes an adjustable mesh headrest for neck support.Armrests: Equipped with ergonomic armrests, which may be fixed or adjustable depending on the specific model variation.Height: Features a gas-lift mechanism for pneumatic height adjustment