Racing computer chairs have a 90-135 degrees tilt mechanism, reclining armrests, and large comfortable seat cushions. Furthermost, the office chair swivels for multitasking convenience, and its five-legged base with durable casters allows for smooth-rolling mobility from one area to another. Features: 1. Follow the computer chair instructions, easy to set up. 2. Adjustable seat height satisfies your different needs for table height. 3. Chair cushioned seat which is full of high-density sponge offers comfort. 4. Rocking mechanism with seat tilt is great for you. 5. Ergonomic racing chair with an adjustable backrest with a 90°－135° safety angle. 6.Movable Armrest; Smooth rolling casters; Removable headrest pillow&lumbar cushion; Comfortable footrest.