Choose one of four synchro-tilt control types for a natural recline. Adjustable arms put a little extra support right where needed. Upholstered back provides excellent support and a sleek look. Tilt tension controls the rate and ease of recline. Upright tilt lock secures the chair in the many upright positions. 360-degree swivel provides freedom of movement in any direction. Pneumatic seat height adjustment moves the seat up and down to adapt to various body heights.