Exercise Balls, also known as Swiss Balls, Fitness Balls and Gyms balls, are a great way to increase balance and stability, improve posture, and strengthen core muscles. Perfect for bodyweight exercises, Yoga workouts, pregnant women, or office chair replacement. Our Swiss Balls are designed to help you activate your core muscles with our anti-burst, hypoallergenic and eco-friendly material as well as the provided stability ring to reduce the risk of rolling over or falling.