There is no road on earth that is covered with at least the thinnest layer of dirt. When we walk via clean pavement parts of dirt inevitably pepper our shoes so that it's shining becomes obscure. This is not so well for both - our nice appearance and hygiene as the dirt reached out foot skin causes soiling and as a result - various deseases.
Well, I'm sure I brought enough arguments to make you sure that dirt-repellent shoes invention will be rather good for each of us.:)
COnsider yourself walking gorgeously in dirt-repellent shoes shining afetr one, ywo and more hours of active being on foot. That's cool as well as nice.
Let me go and think of possible technology of dirt-repellent shoes implementing.