I wear the ballet shoes only in the house, do not run so great through the area, so they should also actually not so much suffer from an overload, but that this defect is likely to occur so rapidly.
I had previously a pair, which I found in a parking lot in fact even still unused and packed ... :-))
Now this is good for 20 years ago! As long as I've worn this ballet slippers, and they certainly have countless kilometers on the soles. Such cracks, as these Betulas I have since, however, never have to realize.
Conclusion: The next time you buy it will be certainly no new Betulas more.
