If you picked up a button-down shirt the last time you were at the Neiman Marcus in Dallas or Belk in Charlotte, you may have noticed that there’s a tiny fabric loop on the back of the shirt ...

Have you ever noticed the loop on the back of button-down shirts? It has a purpose — or at least it used to.

Those strange loops on the back of your dress shirts actually serve a purpose, though it might not be the one you think.