+ According to the manufacturer without plasticizers and strikes me as so ago. Strictly smelling smell of rubber did not occur. + I think my back is a little better, since this ball more than 50%, replaced my office chair (I hope that it is not imagination :)) + Price
o ferrous and non langweillig: D
- The air seems to really do not want to stay forever in it, so a pump to correct once a week is not wrong. For this it is said that a totally lossless ball is not known to me.
