The Leitz Active Sitting Ball with stopper function encourages back and core muscle movement to improve posture and relieve back pain. Ideal for use as an additional sitting solution to keep you active while you work. IGR and TV certified.The safety stopper function prevents the ball from rolling away when standing up and secure for storage. With its minimalist design, this stylish sitting ball chair has a positive impact on wellbeing by effortlessly creating the perfect active working set-up. Alternate every 30 minutes between the ball and a chair and ensure correct inflation according to the manual. Combine with other Leitz Ergo products for an inviting and flexible workspace to help you stay active and productive throughout the day. Use this Leitz sitting ball as a desk chair to keep you active while you work, or for various workouts to improve your posture. With its anti-roll-away feature, you won't need to worry about it slipping out from under you. Its removable cover is washable, so you can keep the sitting ball clean and hygienic. The strong carry handle makes it easy to move from room to room. Inflating the ball is quick and easy with the supplied hand pump. The 65cm diameter makes this.