Highlights3D Headrest and Adjustable Armrests - For optimal head and neck support, the office chair features a 3D headrest with 3.2" adjustable height and 70° adjustable angle. In addition, its armrests are 3.4" height adjustable, providing enhanced comfort.4-Directional Lumbar Support - The task chair can better fit your back by using the 4-directional lumbar support, which is 2.2" vertically adjustable and 1" horizontally adjustable. Even during long working hours, it will ensure proper alignm