Ergonomic Design: The ergonomic office chair provides 5 support points (head/shoulders/back/hips/hands) and appropriate lumbar support, allowing you to maintain the correct sitting position, achieve a more comfortable experience, release pressure, and alleviate shoulder and neck pain caused by long-term work. This office chair is sturdy and durable, with strong support, and can withstand a weight of up to 300 pounds. Breathable Mesh Fabric: The administrative office chair is made of high-quality breathable mesh fabric, allowing airflow to keep you cool and comfortable. Adjustable armrests and anti collapse latex cushions perfectly prevent sweat and heat accumulation, making you feel more comfortable during work that requires prolonged sitting. Flexible and adjustable function : Height adjustable: 10cm/3.9 inches up and down lifting; 4cm/1.6 inch adjustable lumbar support; 5cm/2 inch adjustable headrest (flipped up 30 °); Backrest 90-120 ° tilt adjustment; 90 ° flip up armrest; 360 ° free rotation. Reliable and Durable Chair : The comfortable office chair features silent PU casters, sturdy three-level air bars, and thick explosion-proof seats, with strong load-bearing capacity, improving safety and stability, making you more comfortable and double covered. Size: Office chair height: 118-128cm. Chassis width: 62cm. Sitting height: 42-52cm. Seat depth: 48cm. Seat width: 48cm.