This interior fabric upholstered chair is fully adjustable for improved ergonomic support. High-back design cushions your head, neck, and shoulders. 5" thick foam is built into the 21"W x 20"D seat. Back measures 20"W x 25" H. Features full-function ergonomic controls for seat/back angle and independent back angle adjustment. Includes height adjustable back for lumbar support. Pneumatic seat height adjustment.