This high back chair is made with an upholstery material called LeatherPlus, which is a leather infused with polyurethane and boast a sturdy 27 inch nylon base with 2 inch nylon dual wheel castors. The chair also offers a knee-tilt mechanism that is fixed to the underside of the seat adjacent to the front edge of the chair. The mechanism allows adjustments to be made for a natural sitting position. In addition to the knee-tilt mechanism the chair also offers tilt tension, a pneumatic gas lift for an easily adjustable height and an upright lock.
No complaints about this wonderful chair! I bought it for my office, and I would have to say that it is great to sit in for long periods of time. The thick cushioning on this leather chair is so comfortable, and I love how there is the knee tilt mechanism.