Fashion Tab

Right before it expires they show them with a SLIGHT lock, the entire lock looks darker and won't allow removal. You can see how many days are left by hovering over the tab's name. (It sometimes doesn't show up for people who still have a lot of time.)

Pretty sure even when it's locked, it allows you to unequip design. i dont recall completely, but i think so.

Mine was expired long before I took the items out of it.