I own a pair of these exact boots, size and all, and they are the best , most comfortable boots, I have ever owned. There was no break-in needed. Like a procrastinator I received mine right before a hunt a couple of years ago. I knew I would probably regret it, but I treated them and wore them on the hunt. They were fine. No blisters, like I expected and I wore them for three straight days. I was so impressed I almost bought these when they were first listed a while back. But at 67 years old I don't think I will wear out the ones I have, being in Utah I won't get a tag but every few years. Even when I saw these relisted this week I was tempted!