The Reebok 65cm Stability Gym Ball is designed with a slightly weighted base to provide stability and prevent it from rolling away during workouts. It also features anti-burst technology, ensuring a slow and safe deflation in the event of a puncture. This versatile fitness equipment can be used for a variety of upper and lower body exercises, such as ab crunches, planks, and squat variations. The box includes a gym ball pump, and it is recommended for users between 170-185cm in height.