This shoe is THE MOST COMFORTABLE SHOE I HAVE EVER WORN!  My current 45 unisex size worked for these as well.  Truly remarkable!  They are lighter than standard Arizonas, and break in more quickly.  I have plantar faciitis , and wearing Birkenstocks have resolved my condition!  You can wear this shoe outdoors, get it muddy, and just throw it in the tub to wash it.  I hope Birkenstock keeps these around forever!