CanDo NonSlip Inflatable Exercise Ball with Stability Feet, Orange, 21.6" CanDo Inflatable Exercise Balls with Stability Feet make exercise fun and improve balance, coordination, flexibility, and strength Unique stabilizing "feet" keep ball from rolling when not in use Retracting "feet" allow the ball to function like a standard exercise ball when in use Great for children in the classroom, fitness enthusiasts, athletic trainers, and even pregnant women in birthing classes Non-slip latex-free material supports a 300 lb weight capacity