An office chair is a specialized type of seating designed to provide comfort, support, and adjustability for individuals working at a desk or computer for extended periods. Its core function is to promote ergonomic posture, minimizing strain on the spine, neck, shoulders, and legs. Key components typically include an adjustable seat height, allowing the user’s feet to rest flat on the floor with thighs parallel to the ground; a backrest, often featuring lumbar support that contours to the natural curve of the lower spine to prevent slouching; and a seat pan usually padded with foam and sometimes upholstered in breathable mesh, fabric, or leather for comfort and temperature regulation. Most chairs incorporate a swivel base on smooth-rolling casters, enabling easy movement and access within the workspace without requiring the user to stand.