Ergonomic Task Chair: Y-shaped lumbar support and C-shaped backrest conforms to the curves of the spine to provide adequate support, relieve unnecessary pressure on the spine and reduce back pain Multi-purposeful Seat: 360° swivel seat and wheels ensure flexibility, lumbar support, padded seat cushion, height adjustment Excellent Seat: These seats are made of thicker foam and covered with nylon mesh for better breathability Armless Design: The armless design of this chair allows it to be easily pushed under the table, saving storage space Easy Installation: We provide video tutorials and instructions for you, reduce the time it takes you to install