Giantex Ergonomic Office Chair, High Back Mesh Computer Desk Chair with Adjustable Backrest Headrest[Cozy 2D Headrest & 3D Armrests]: For personalized neck and head support, the office chair has a 2D headrest that is 2. 6 height adjustable and 40 angle adjustable. In addition, the 3D armrests can be adjusted 2. 8 up and down, 1. 6 forward and backward, 45 left and right to help you find the comfiest sitting posture. [Wide Backrest & Lumbar Support]: The high back desk chair provides ample support area to minimize discomfort when you are working.