the material is high quality, slip - and abrasion-resistant, skin-friendly and free of harmful Phalaten
Advantages
all adjustment under the seat cushions of the ball
hand air pump included
robust processing
exercises in sitting the back muscles
large color selection
hole to the relief of the anus and dam
disadvantages
it smells slightly to the rubber
to find no outlet valve
it wobbles not enough for boarder training
after some time is tiring sitting
our video from the donut balance cushion
Conclusion
With the ball seat cushion "Donut" is a good ball seat cushion, which is however not really suitable for more intense balance training. It wobbles just isn't enough and it's too easy to keep a firm footing. As a seat cushion for the Office, the "donut" makes a better impression. Who also maybe has problems with coccyx or hemorrhoids, could try out, if the ball seat cushions here gives you relief.
