The hula hoop is made of 0.7 mm thick stainless Steell tube, which offers a 90% increase in stability, making it more durable and undeformed than a plastic inner tube hula hoop. Enjoy the fun of fitness without worries! Product net weight: 1 kg Use crowd: children, adolescents, adults Material: outer foam, inner stainless steel Components: Six-section combined hula hoop Packaging accessories: 1x hula hoop Size: outer diameter 94cm Use crowd: children, adolescents, adults Material: outer foam, inner stainless steel Components: Six-section combined hula hoop