The Leather Comfort Series provide a balance seating environment to help reduce stress on the muscles of the thighs, back, neck and shoulders. This Executive High Back Chair model features an inflatable lumar support that is orthopedically designed to give a customized adjustment. Swivel seat includes a pneumatic height adjustment. Five-star base is formed from nylon and includes dual hooded casters. 250 lb. rating. Black finished leather upholstered seating surface. Easy assembly.