This chair has a Cellular Suspension seat and back material that is lightweight and breathable. The material evenly distributes the user’s weight over the seat and allows the back to provide flexible and continuous support. The Harmonic tilt provides continuous balance and lets the body recline naturally, pivoting at the ankles, knees, and hips. The chair has a 5-star base and pneumatic adjustable height. The chair has fixed arms, tilt-tension, but no other options!