Adjustable Head Rest. The sponge cushioned seat is constructed of breathable mesh that provides you ultimate comfort for hours while sitting at your desk. Features flip up mesh cushioned arms that you can push out of the way when you need more freedom of movement. Lumbar support panel at the bottom moves with you as you lean back or forward in this chair to give you optimal support at every position. The adjustable height, sleek 5 wheel 360 degree swivel base, and adjustable head rest allows you to maneuver freely around your office space all while customizing this chair to work for you!