Product Features: Ergonomic design: The office chair adopts advanced ergonomic design, and the lumbar support, backrest, seat height and armrests are all adjustable. It is designed to adapt to people of different heights and facilitate you to adjust your sitting posture, so as to relieve the fatigue caused by sitting in the office for a long time or sitting for a long time to play games, and effectively protect your lumbar spine and cervical spine. Breathable and comfortable fabric: The surface of this ergonomic lumbar support chair is covered with soft, highly elastic, breathable and durable mesh fabric, which can keep it breathable and refreshing to ensure your comfort. The seat cushion of the desk and chair is filled with thick high-density foam, which brings you a wonderful experience and comfort. Easy to assemble: Contains a detailed user manual and all necessary components. Just follow the instructions to easily assemble our ergonomic chair without the use of other tools; the