Get toned and improve your core strength with the Reebok Toning Gym Ball. This essential piece of gym equipment enables all-round fitness and can be used to perform a broad range of exercises. Whether you want to build muscle or alleviate back pain, this item serves many purposes. The weighted base provides stability to your exercises and offers additional grip. If you want a gym ball which is ideal for a number of workouts, this product is ideal for you.