I wear shoes like this 6 days out of 7 for 12 hours. I come from a pair of magnum who had served their time (2 years), and the interior was really filthy. I have this new pair for several months, it is more resistant to external aggressions (magnum were damaged in the first week) and quality of the interior seems higher. Especially it seems that there is less friction of fit and I think they will last longer. Final verdict in 2 years)