It's proper leather, quite smooth though (apparently they are polyurethane coated?), but I did Renapur them before I even used them the first time and it seems to absorb well. They come up high, this was one of my requirements this time around, proper shin protection. They are still wearing in, but they are getting there and I expect them to last me for years. 100% waterproof and definitely warmer than my old boots, haven't even used the Sealskinz with them once, not needed. I'm not a zip fan, I prefer velcro, but buckles are the compromise and after getting used to them I can get the boots on and off very quickly. It takes a few tries to find the right adjustment on the buckles, but they're easy to adjust and once you have it right then you just leave it like that.
Here's a quicky review of them: