The Poltrana YS-819 is crafted to deliver exceptional ergonomic comfort for extended work sessions. With its multi-lock mechanism, users can adjust and lock the backrest at multiple angles for customized posture support. The injected molded foam seat offers long-lasting cushioning that adapts to body contours without losing shape. Adjustable PU armrests support natural arm positioning, reducing muscle tension during long hours. The adjustable lumbar support and headrest work together to maintain ideal spine alignment, making the chair perfect for professionals who demand comfort and stability throughout the day.