Scott, Yeah be interesting to see what they say about the rubber. Like I said I just know that I had two pair of Meindls and one was the rubber band bottom and the other wasn't. Both treated and dried the same and both same size and then I just noticed the rubber one got way to small to wear.
Either way, good to hear about Kenetrek boots and there quality service. I like the heavy build of these types of boots and will keep them in mind when the time comes for replacement of my current boots.