Sizing fits your actual foot size. No breakin neccessary. Factory insoles are thick and removable just like aftermarket ones you will use to replace the originals so boot size is consistant.
Boot provides almost no ankle support, so if you need that these are not for you.
Pros: No ankle support
Cons: Excellent boot in all other respects
This review was written in the old system and had content requirements that are different than reviews written today.