Sorry that that's an adjective rather than a noun, but I do some semi-urban backpack travel that often involves stealthing... wearing a smallish traditional backpacking setup used to get me questioned by police. Where are you from, where are you staying, etc. (as if you're legally required to have a pre-arranged location for sleeping every night...). With UL/SUL techniques I'm just another guy with a bookbag when I want to be. This type of travel also often involves a small laptop, so that's an extra item too.
Also, if I go by a great used book store with a 25-cent rack I can afford, weight-wise, to load up on a few paperbacks whereas previously I would have skipped them.