The Topstar Sitness 40 functional office chair makes your sitting active and healthy. With its innovative 3-dimensional Sitness® technology, it enables natural movement in all directions, which strengthens your spine and prevents back pain. The orthopaedically shaped seat ensures a high level of comfort, while the infinitely variable seat height adjustment and the height and depth-adjustable backrest guarantee optimum adaptation to your needs. Whether in the office, at university or at home - the Sitness 40 offers ergonomic sitting that promotes movement and well-being.