【Ninth generation】The 9th generation of Sucizi Smart Hula Hoop have the superior hand feel, easy-to-spin performance and noise control in similar products, worth buying and comparing.【2 in 1 Fitness and Massage】360-degree shock-absorbing massage rings allow you to exercise comfortably and relieve the labor pain of the lower back after sitting for a long time. suitable for aerobics and dancing, helps lose weight and obtains the most relaxing effect.【Timing system】 The upgraded hoops for exercise has a digital display function, which can accurately record the exercise time for exercise rotations. 30 minutes, five times a week, you can burn 800 calories! It burns fat, makes the waist slim.【Smoother and Easier】Upgrade seamless built-in track sliding smoothly . The bearing is smooth and durable, and the rotation is more flexible. It can also be used in various scenes indoors and outdoors. The maximum waist circumference of a single hula hoop is 42 inches. You can purchase one more to make two hula hoops, one large and one small,or combined into two hula hoops with mixed colors.