Ok. thanks for the explanation.
I find it hard to believe that you can stop something like that by changing one little thing. I mean, there are going to be people that go from one to the other in tennis shoes, bare feet, float tubes, dirty socks....etc. I just have my doubts that will stop it. If the rubber isn't as good as felt, it may stop my wading trout fishing....bad knees and back won't let me take falls on every trip.
Thanks again for the info guys. been away too long.