With the focus on premium quality and safety, our weighted'hoola hoop have been finished to the highest standard and smoothness and is made of hard'ABS plastic and soft silicone ball fully enclosed with iron sand materials to avoid leaking. Whether you want to'lose'weight or'belly'fat, the silicone gravity ball has enough'weight to burn up to 800 calories using our exercise hoop for 30 minutes. Our fitness infinity hoop Consists of 24 detachable Knots which can be adjusted easily according to your waistline, suitable for waist size up to 47 inches. From our family to yours, our promise means that you will never have to worry about buying another'hoola'hoop again. Enjoy exercising knowing that if there are any problems with our'hoola'hoops, we'll send you another one free of charge.