I just got these and put them on right out of the box. It is cold in my house (68 degrees) and already the bottoms of my feet are sweating.
These shoes would be perfect if the inner sole had a lining. That said, I'm glad I read the reviews with regard to sizing. I normally wear a 7 or 7 1/2 B shoe. I got these in size six and they fit perfectly! Aside from the sweat factor, they are comfortable and attractive, so I'll powder the soles of my feet and see what happens...