IntimaTe WM Heart Ergonomic High Back Executive Managers Mesh Office Chair with Headrest Breathable open mesh back support with headrest;Chair tilts from a point under the center of the seat allowing you to waggle DESIGN FOR YOUR COMFORT:The mat and the armrest are made of Polyester and microfiber,which can reduce your hip pain and back pain; CARE FOR YOUR HEALTH: Headrests can reduce neck pain and strain by giving the user a place to rest their head when relaxing or reclining. Must be adjusted to the proper height, depending on the user.? ADJUSTABILITY: Adjustable lumbar support conforms to the needs of different users. Adjustable-Height arms allow users to rest their forearms while typing;Pneumatic gas lift allows for easy height adjustment DURABILITY AND STABILITY: The chair base that made of strong and durable metal provides chair stability and smoothy movement. 5 point chair base is more satable.Typically, the larger of the diameter, the more stability will the base provides. Good for heavy use