WolkWook Professional Weighted Foam Padded Fitness Exercise Hula Hoop Abs Workout, for yoga exercise(7 pcs) Exercise Hoop: external is made by foam cushions, it's comfortable and durable. And the diameter of 7 pcs and 2.2 pounds hula hoop is suit for: 100 - 160 pounds. Wave design: the wave shape design make the operation more convenient, and the massage area is bigger. Compactness buckle: install closely fastened, normally not loosen when you turn it around Foam thickness: foam thickness is enough, and not hurt the waist Easy to carry: easy to assemble and disassemble, easy to store and carry.