If you do put a hairdryer.in them, I wouldn't walk aroumd in them, as it is just going to make the heel bigger than you want. its not a bad idea to wear them in ur house while wacthing tv, with the weight forward on the tounge, as ur weight is forward most of the time u ski, it will give u an idea of how they fit, and if u need to have any work done. Another added benefit is that if you wear orthodics, either custom or store bought, and don't wear them normally, it will get ur feet used to them again, but in reality, the only way that you are going to actually break them in is by skiing in them.