✔ EASY TO USE AND ASSEMBLE: Our Smart hula hoop is easy to use. It doesn't fall when you adjusted to your perfect waist-size. It's easy to assemble and disassemble according to your body size. It's for everyone, children, adults even beginners. It is very easy to disassemble at any time for easy storage and transport. ✔ ADJUSTABLE SIZE/MORE SPARE PIECES: Consists of 27 small detachable knots that are easy to remove and install, so you can choose your own hula hoop based on your waistline. Fit for waist up to 62''. More is always better!!, More spare pieces when you have a smaller waist!! ✔ STAY IN PLACE HULA HOOP: This smart hula hoop trims your waistline without torturing your hips. Instead of manual spinning, this has a soft weight ball that only requires a little momentum to get the same or even more results. ✔ 360 DEGREES MASSAGE: The shock-absorbing massage contacts are in full contact with the muscle, massaging your waist muscles while inertial sliding and fat burning faster. ✔ SUITABLE FOR ANYONE: The Smart Hula hoop is suitable for a variety of skill levels from beginners to professionals. The ideal of exercise, fitness, weight loss, and fun.