CanDo Inflatable Donut Ball, Red, 29.5" CanDo Inflatable Donut Balls make exercise fun and improve balance, coordination, flexibility, and core strength Unique design with a flat side provides stability making this ball perfect for sitting, stretching and exercising Rounded shape provides all the benefits of a traditional exercise ball Available in 5 color-coded sizes for Adults and Children Non-slip latex-free material supports a 300 lb weight capacity