The pallium is the most common unofficial Roman outdoor garment. It was originally Greek and in Rome it was draped like a Greek himation, held by a fibula, not hooked as in Greece. It was a rectangle as wide as from the wearer's shoulder to the floor and about three times as long, and was worn over the tunica by men, women and children, civil an military. The pallium seems possibly to have been quite a colourful decorated item, hence possibly an outdoor vestment of the wealthy.
The pallium was the characteristic sole garment of the scholar and the philosopher.