Spring hoop. Korean style Hula hoops
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Outer ring is made of PVC spring composition enhances the flexibility of springs, the inner ring is made with steel springs formed, enhances her strength, through the coordinated movement of the hoop rotating the body, can be a good squeezing belly, a peculiar effect on weight loss. This hoop features not only weight loss, and is said to have a massage-like effect in the short term to improve low back pain and indigestion problems.