Do you sit at an office chair? If you do it could very well be due to your heels scraping on the wheels (in particular the little wheel housings) of the chair. Happened to me with my OSB trenches. Regardless, I did not know that black CXL does that when it gets abraded, can't say I dig that compared to natural CXL. Nice boots nonetheless.
8/30/14 at 6:49am