Introduction  You almost certainly own a camisole. It’s the soft, thin-strapped top you reach for without thinking, under a sheer blouse, under a sweater, or alone on a warm day. Yet if someone asked you to define it, or how it differs from a tank top, you might pause. That’s the camisole: quietly one of the most useful things you own, and rarely given credit.  Here’s the short version. A cami does three jobs in one: innerwear, layering piece, and standalone …