Won't stretch, won't break in properly.  No help since I wore them out in the field already.  They fit snug to begin with and, as with all other boots, were expected to loosen up upon break in.  After going out on 6 hunting trips, with more than 6 hours of rough hiking on each, I can say that these boots would gladly be returned if possible.  I'm going to buy a pair of Irish Setters next time; they are comfortable from the instant I put them on at a lower price to boot! (pun intended)