In Marblehead, a 911 caller was having nun of it

Worth noting that there are a host of "habits" worn by religious orders that may not fit the more-commonly seen apparel. Also, not all religious garb is worn by Roman Catholic nuns. There are Episcopalian orders that still have the habit and even a few evangelical lay orders that wear some kind of specific garb.

Of course, many religious orders have also dispensed with the so-named "habit" in modern times.

Members of the LDS Church (Mormon) that have been received in the Temple are given a set of religious garments that are supposed to be worn underneath one's street clothing. It is symbolic and a reminder of their station as a minister of their faith (both men and women). So they are wearing their garments but are not seen.

Of course, wearing a religious habit is usually a good way of getting a seat on the subway or getting the doors opened for you. Food for thought. :-)