They're totally comfortable, always fashionable ... and not super-sustainable.
It's one of the most famous — and ubiquitous — articles of clothing in modern history. So much so that you're probably wearing one right now.
It's the mighty T-shirt, and though it may seem simple and unassuming, there's quite the story in its humble threads. So, in honor of T-shirt weather, here are nine important things — good and bad — that you might want to know about this beloved article of clothing.