Sometimes you like to tuck your cords into boots. But sometimes that proves a difficult task, as your calves are too, you know, muscular. Plus, it's just plain hard to jam those gams in alongside your pants, which are all folded up and pushed up weird. So you need these tapered cords for $40.
If, while you are buying those cords, you also purchase these 'arm warmers,' goodbye, it was nice knowing you, but you are no longer welcome around these parts.