Pilei (plural of Pileus) are woven wool caps, sometimes called freedom caps and used as symbols of freedom from ancient times to the modern era. Pilei and pilei with stars above them are also frequently used to represent the Dioskouroi. Pilei represent freedom because freed slaves wearing pilei would follow their former master in his bier at his funeral (demonstrating his magnanimity and bringing him prestige). The form of the Roman pilei was varied; some were round, others resembled a helmet, some were shaped almost like a pyramid, and some were of a more depressed form. The Romans for he most part went without hats, except on religious occasions, the saturnallia, or when on journeys or military service. The pileus was also sometimes worn by the sick, old men and newly freed slaves (the latter in token of liberty).