Have problems in my upper spine and shoulder from sitting on the computer so much - I am a teacher. Until I got this seat - I was going to the chiropractor once every 2 months. Use this in my chair and have absolutely no problems with my back. I had one previously that my sweet high-school darlings popped one day when I was out. This one seems a little more sturdy. I thought one side was smooth like my other but is not - I have to put fabric over it - so I don't feel the bumps when I sit. But I could not live without this product!Get more detail about J Fit Balance Training Disc with Pump.
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