Made with an upholstery material called LeatherPlus, a leather infused polyurethane. It features a sturdy 27" nylon base with2" nylon dual wheel castors. It offers a spring tilt mechanism allowing you to change the angle of the seat relative to the floor and to transfer some of the upper body weight to the chair's backrest. This chair also offers tilt tension, a pneumatic gas lift for an easily adjustable height and an upright lock.