Smart Infinity Weighted Hula Fit Hoop For Adults Weight Lossexercise-360 Degree Fit Waist Fitness Hoops Massage Equipment-24 Knots Adjustable Size With Ball(Blue)easy to assemble The Aedor Weighted Hoop Plus Size is made of hard ABS plastic ,compared with the traditional hula fit is easier to use and will not fall off,even the beginners can play fi..