Reebok Gym ball gray and black two-tone is one of the most versatile pieces of exercise equipment for improved all-round fitness used to perform a wide variety of exercises which will considerably improve your core strength, posture and flexibility. Its weighted base provides additional grip and helps to stop the ball rolling away during every type of exercise. It has been manufactured with a high-density rubber to ensure longevity, and is suitable for those 188 cm or taller.