Workwear is the clothing worn by almost mythical American figures - cowboys, miners, farmers and railroad engineers. Right now it's trending chic. Big-name international designers are collaborating with so-called U.S. heritage brands warmed back to life by fashion's bright lights. This matters not at all to many men, from high school students to octogenarians, who've always worn this stuff because it keeps them warm, it keeps them dry and it lasts close to forever. If it seems a bit jarring that workwear is enjoying a moment when unemployment is high, job creation low and the median household income falling nationwide...