ERGONOMIC OFFICE CHAIR - The ergonomic chair provides 4 supporting points(head/ back/ hips/ hands) and a proper lumbar support. It's easy to adjust seat height, headrest, backrest and flip-up arms to meet different needs, good for sitting long hours. * Note: The grey desk chair is suitable for people of about 5'5" to 6'2". ADJUSTABLE FLIP-UP ARMREST - Folding the armrests up, you can push the executive office chair directly under the desk to use more area. It's easy to raise or lower the folding armrest by pressing the black buttons on the armrest. BREATHABLE MESH SEAT - The office mesh chair is larger than other chairs, and it could accommodate different body build.