And that may be because it's readily apparent to all, but anyway . . . . br> While essentially only cosmetic (And in addition to the application of whatever balms and poultices you feel compelled to slather upon the hide. ) the top of the welt where it has those little ridges and joins the uppers steadily collects dust and occasionally other debris as well. This can easily be overlooked, but does a lot to degrade the appearance of footwear. So for many years an indispensible part of my gear is a worn-out soft variety toothbrush. Brushed along the top of the welt, it quickly and easily removes any dust, etc., and does a lot to improve and maintain the appearance of footwear.