The Leitz anti-tilt sitting ball encourages back and core muscle movements to improve posture and relieve back pain. Ideal as an additional seating solution to keep you active while you work. With a diameter of 75cm, this sitting ball is ideal for people measuring between 1.81 and 2m and weighing up to 150kg. The safety stop function prevents the ball from rolling when upright and allows for easy storage. With its minimalist design, this elegant sitting ball can positively impact your well-being by effortlessly creating the perfect active work environment. Alternate every 30 minutes between the ball and a chair and ensure inflation is correct, according to the manual. Combine it with other Leitz Ergo products to create an inviting and flexible workspace that will help you stay active and productive throughout the day.* Tested and recommended by the German IGR institute for health and ergonomics, in compliance with DIN 26800 and ISO 15537 standards.* TÜV certified anti-tilt safety device to prevent the ball from moving when you stand up * The strong and durable carrying handle allows it to be easily moved from room to room* 65 cm diameter with a robust phthalate-free ball suitable for sizes between 1.81 and 2m and a maximum weight of 150 kg* Simple and quick installation by inflating the ball with the provided manual pump and inserting the plug (inflate the ball to 80%, wait 2 hours, then inflate to 100% for the cover to be perfectly tight)* The ball cover can be removed and hand-washed for hygiene reasons* Includes a sitting ball, a fabric cover, a manual air pump, two plugs, a plug remover, and an instruction sheet* Plastic-free packaging