The Topstar Sitness Half Ball office stool combines ergonomic design and functional training in one innovative piece of seating furniture. The infinitely variable seat height adjustment via top lift allows you to set the perfect height for your individual needs, while the mechanical seat depth suspension offers additional comfort and flexibility. A special highlight is the removable half-ball, which can be removed by simply opening the zipper. This can be used as a training device for your stomach, legs and bottom, so that you can stay active in the office and work on your fitness at the same time. The stool not only promotes a dynamic sitting posture, but also ensures better posture and more mobility during the working day. As an added bonus, an air pump and exercise poster are included to help you make the most of the numerous exercise options. The Topstar Sitness Half Ball is the perfect addition for anyone who wants to combine ergonomic sitting with active movement elements. Enjoy a healthy sitting experience and increase your well-being in your everyday working life!