Quote:I tried them on again last night bare footed, and they feel like there is a firm spot right on the back of my heel
Maybe I'm mis-reading this, but it sounds like those boots are pretty snug if you can feel potential trouble spots barefooted?
If you bought them snug to wear little or no liner sock, then blisters have to be a concern.
Wet feet translates into soft "rubbery" skin which can lead to blisters.
At the bare minimum you want a synthetic liner sock that will rub/disburses heat instead of your bare skin.
Another little trick with liner socks to avoid blisters, is to rub your heels/soles of feet and toe areas with unscented underarm deodorant. This will cut the friction down to nothing.
They make a version they sell at running stores, but the deodorant will do the same thing, much cheaper.
Also remember that under a load especially, your feet will swell at least one full size or better.
You can custom lace your shoe to keep it snug, but allow for your foot swelling.
Any running site online would have detailed directions on how to lace for this.
I work 12 hrs on a concrete floor and use the deodorant , a thin liner sock and the lace technique every work day and my feet thank me for it