Giantex Ergonomic Mesh Office Chair, High Back Desk Chair with Adjustable Headrest, Lumbar SupportAdjustable Headrest & Armrests: The headrest is adjustable in height and angle to provide optimal support for your head and neck. The armrests can be flipped up, and the upholstered lumbar support with 2. 5" lift and 1" fore or aft adjustment can keep you in the best sitting position. Ultimate Comfort Experience: The ergonomic backrest, made of breathable and abrasion resistant mesh, promotes airflow, keeping you cool even during long hours of work.