Received this today for my review. Very well made and very durable. Came with its own pump.  My son used it and loved it.  It is very easy to use without causing too much strain on the body.  The only issue I saw was pumping it up, it took quite awhile with a small hand pump that came with the ball.  Could have used some instructions of exercises, but I was able to look online for proper use of this product.  I recommend this product. Disclosure: I received this product at a discount in exchange for my honest review.

http://www.amazon.com/Exercise--Professional-Anti-burst-Free-eBook-Exclusive/dp/B010J1JTOC/ref=sr_1_5?ie=UTF8&qid=1442201695&sr=8-5&keywords=exercise+ball


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