Go for the thrill. the frameless back of thrill provides the flexibility you desire and easily adapts to your unique shape for sensational comfort. the open design of the poly back provides exceptional ease throughout the day. kindle that spark and complete your style with a classic black frame and a black nylon base. this chair offers swivel tilt mechanism with tilt tension and tilt lock to keep you relaxed no matter your preferences. the free movement plastic back comes in vibrant black, white or green so you can perfectly express your style. now the thrill of the chase will always be on your side.