Equally important as the boots are the socks and, for some, shoe inserts. A good quality sock such as Darn Tough will make a huge difference. I actually wear two pairs of socks with my boots: A very thin pair with a thick wool sock over top. I also wear a shoe insert (Superfeet Green) as I have narrow heals. All of these help prevent blisters. Folks might say that two pairs in the summer will be hot. Where I am, the temperature is well over 100 for three months of the year and tops out at about 125 for a week or two. Hot feet are better that blistered heels. By the way, I wear Garmont T8s and log about 10 miles a day in them.