I was pleased with Overstock in their fastidiousness in shipping in delivery, but my girlfriend was very dissatisfied with the ball itself. It was worn around the area to inflate, and the ball does not stay inflated very long, losing air during her workout. I feel like I bought a used ball. It now lies used twice in two months because it won't stay inflated while she uses it so I have to find another one for her to use. Do not recommend.
These balls are great. My husband and I use them instead of office chairs. We work from home and found they are great for extra excersise and posture. We bought two for our daughters 7 - 8. So now when they are on the computer they get the same benefits!!
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