CanDo Inflatable Donut Balls are the ideal tool for exercise, workouts, core training sessions, stability training, Yoga, Pilates and balance training. The unique flat sided design of the Donut Balls helps the user improve balance, strength and stability. Finding balance means the core is engaged and getting stronger. The flat side of the Donut Ball works the core and provides stability while sitting, making it perfect for work or the classroom. The rounded side is for active exercise. The uniqu