believe it or not that looks like what passes for clean for coal work clothes (seriously coal and sweat combine into a grease that is hell to get out of clothes without adding some form of mild acid)
ok now those two
front and center look more than a little suspicious, even long term staining won't do that to your skin unless you just never bathe... and the mud on the shirt of the other... nah, I aint buy that shit. we have plenty of coal miners here, of all types, and none of look like unless they literally just walked of the work site.
actually that's not quite as scary as it sounds... basically the ruling was you can tell you employee's to do whatever work you want to, but you can't make them do it for free.... which is still a crap circumstance... no one should be compelled to work in the interest of a political candidate unless that is the sole nature of their job.