This sand filled ball is ideal as an alternative seating option for use at home, school, or at the office. The movement that it provides helps to keep the mind engaged while providing an outlet for excess energy and decreasing anxiety and stress. The 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. * PROFESSIONAL GRADE - The balance ball is constructed from heavy duty, anti- burst materials, and is built to last. * NON ROLL - The weighted, sand-filled feature allows the ball to stay in place while is use as a seat, and during exercise routines. * INCREASE FOCUS – The Swiss Ball can be used as an alternative seating option. It can provide movement to increase focus and attention during class or work. * ALLEVIATE ANXIETY AND STRESS - Active seating can decrease stress, alleviate anxiety and boredom. * CORE STRENGHTH AND POSTURE - The exercise ball can increase core strength and improve posture while actively engaging abdominal and trunk muscles.