The problem is that most individuals don't have enough resources--shoes, feet and environmental conditions--to test anything properly or objectively.
A number of people pop up in this thread recommending conditioners or "dubbins" that leave a greasy residue. And arguably, for most of the people making those kinds of recommendations, a spit shine on the toes...for instance...isn't a high priority. So their recommendations may indeed be perfect for their desired outcomes. But not everybody shares those druthers.
Similarly, for rubber outsoles and the issue of "breathing." Some people may get away with rubber outsoles fine; some won't, but can't (or but won't) recognize the problem; and others even suffer disease. Any objective analysis or "testing" has to encompass all those different factors. It can't be so singularized that even if others can be found who have had similar experiences, those that haven't, are ignored or dismissed.
In the end, it doesn't matter what any one of us has experienced...that perspective is fundamentally ego-centric...it only matters what the objective facts about the materials or techniques or situations are. It doesn't matter if 100 people put Topy on the bottom of their shoes and are happy with it and never get cracked insoles or tinea pedis. It only matters that the materials are inherently occlusive and objectively, inherently problematic.
The Golden Boys out there can, and should, rejoice, but the rest of us have a reality to confront...preferably before the sun goes down.
Edited by DWFII - 10/20/14 at 5:00pm