Boston Genuine Shearling Lined Clog (Women)

I hated open back shoes until I purchased my two other pairs of Birks in a 39. My foot normally fits so perfectly in the footbed that they stay in place cradling my feet. My heel comes right to the edge of this new pair, and the footbed is not as deep as my Arizona pairs. I am not sure if it is the change in style or the fact that these shoes came in a plain brown box with Birkenstock hand written on them in marker. I am going to return these and order from the Birkenstock site.