A sit ball can easily be turned into a comfortable office chair with this Tunturi Gymball Cover. When you sit on such a ball, your body has to constantly find a new balance. In this way you are unconsciously training your core and back muscles. The cover can be wrapped around an anti-burst gymball with a diameter of 65 cm. You can close it with the bright green zip. The gymball cover features a weighted part on the bottom. Convenient, as it prevents the ball from rolling away when you sit on it.\n\n- Cover can be washed in the washing machine\n- Weighted part to prevent the ball from rolling away\n- Ideal to turn a sit ball into a comfortable and muscle strengthening office chair\n- With handle to easily move the sit ball\n- Bright green zip