Fresh Air Refreshes Totally

Fresh Air Refreshes Totally (F.A.R.T.) was a movement of wizards who preferred to wear robes at all times in public, even when in the vicinity of Muggles, because they believed that trousers "stem[med] the magical flow at source" and that a having "healthy breeze" around one's "privates" was desirable.

Members of the F.A.R.T. movement were repeatedly warned and fined for violating the International Statute of Wizarding Secrecy. The Statute laid out a code of dress that wizards and witches were supposed to follow when interacting with Muggles.

Muggles who encountered members of the F.A.R.T. movement apparently assumed they belonged to a cult.