I've got a pair of Gore-tex Danner boots that I love and are quite comfortable. But at the end of the day I would always have blisters on my heels. Yes, I do understand that "blisters" and "comfortable" are not readily used together, however, I do still like my boots. I just buy some moleskin and put it on my heels and I don't have any more blisters. I'm sure there are folks that have better ideas, but this works for me.