GUC - Minimal wear and tear on a great boot with a VIBRAM sole. (They don't use Vibram on the latest generation!) They literally still feel new when I step into them. See photo of insole for how little I've worn them. The last pair of these that I bought, I used in Colorado and Michigan for 12 years solid, and they're still going. I just don't need these because I don't live in very cold weather anymore.