Oh great now they are gone from the AE site already what did everyone cause them to do pull them!? But from what I recall they were Dublin leather. I have owned Mountaineering boots since the 70's and gone through the transition from Approach boots, single and double, etc. And look for crampon compatible boots which I do not believe those were either. Do you know what is up with the tanker boot strap they have on them? I have never seen anyone at Alpine level wearing boots with straps at that point. Only boots I have seen it on are some RL boots. Which I certainly would never take above tree line.