Ergonomic design: The ergonomic office chair adapts perfectly to the contours of the body and relieves back and spinal pain. The chair is made of sturdy and durable PA material. The breathable nylon fabric and gas springs meet the requirements of BIFMA and SGS certification, and the nylon foot has undergone a pressure test of 120,000 cycles. 90° Folding Armrests: Mesh padded office chair with foldable padded armrests and 90° swivel armrests for flexible elbow support, making office work easier and more efficient. The 360° casters are quiet and protect your floor from damage and move smoothly. Thicker cushion for more comfort: The seat cushion is filled with 7 cm thick sponge, very durable and breathable. With a width of 49 cm and a length of 52 cm, the cushion is suitable for a variety of sitting positions, gives a sofa-like feel and helps distribute pressure on the hips without numbness. Pendulum tilt function: office chair with liftable air lever, you can adjust the height lock yourself according to your height. You can freely adjust the angle of the backrest, the office chair can be tilted up to 130°, the backrest can be locked at 90°, adjust the height of the office chair (10cm), suitable for different heights of adults, teenagers and other people and different desk heights. 【Customer Service】Our office chairs have excellent customer service. Whether before or after sale, we promise to provide satisfactory customer service after ordering our office chairs, as long as you contact us, we promise to provide warranty and replacement services.