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. Adjustable lumbar support customizes your lower back comfort. 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.