Exercise Ball with Stabilizing Sand, 65cm, BlackThis sand filled ball is ideal as an alternative seating option for use at home, school, or at the office. The movement it provides helps to keep the mind engaged while providing an outlet for excess energy and decreasing anxiety and stress. The 65cm weighted ball promotes excellent posture while building core strength. The sand filled feature ensures that the ball does not roll around when it is not in use. Recommended age 14+ years