Multifunction Headrest - A long-day work will cause neck problems. The ergonomic high back office chair is designed with adjustable headrest. Multi-dimensional free rotating headrest provides the most comfortable position for your head and neck. Functional Lumbar Support - This ergo office chair has excellent functional lumbar support, to provide the best support for all types of people. It can hug your lower back all the time to greatly reduce spine fatigue. Equally the lower back support will relax your body and ease any back pain, even enhancing the natural curve of the spine when you are sitting for hours. Ergonomic 3D Armrest - This office chair is designed with 3D multi-function armrest, which is fully adjustable. The 3D armrest will maximize the satisfaction of various needs, provides the most comfortable sitting position for sedentary people.