This sandal is very comfortable to ware. The bottom vent holes are very cooling. I liked them so well I purchased a second pair. The only negative thing about them is the soles seem to ware very quickly. Well worth the price.
I find these sandals very comfortable both with socks and without. I have not had any hot spots or blisters walking on concrete; I have not walked in them on the beach. They are easy to get on and off, and the tightening cords keep them from flopping around while walking. I am very satisfied with them.