Sihoo A3 DORO C300 Ergonomic Chair Domino three-dimensional lumbar support The innovative Domino three-dimensional lumbar support, which is a genius idea that combines the variables that affect comfort and health as a lumbar pillow. The Sihoo DORO C300 is the perfect choice for anyone who suffers from back pain or discomfort while sitting for extended periods. 6D armrest The chair is equipped with 6D armrests that are fully adjustable (Up & Down, Front & Back, In & Out, Upside down, Rotate 75 o, Linked armrest with backrest), providing customized arm support for maximum comfort. Headrest The 3D adjustable wide-angle mechanical headrest is designed to support your neck and head, ensuring a comfortable sitting experience. Full Mesh Design The chair is made with high-quality cloud cloud web cloth, which is highly durable, has high tensile strength, and good elasticity. The full mesh design ensures excellent breathability, keeping you cool and comfortable even during extended periods of sitting. 138o recline angle The Sihoo DORO C300 also features a 138o recline angle, allowing you to lay back and relax. The smart gravity sensing chassis can sense the weight of the user and automatically adjust the recline force, making it suitable for all users. Seat Slider and Seat Height The seat slider and seat height are fully adjustable, allowing you to customize the chair to your specific ergonomic needs. The convenient one-touch control enables you to adjust the chair height, seat slider, and recline with ease.