Materials, Wool 7th century B.C.

Roman garments were usually made of wool, and much of Roman clothing was designed to reveal the social status of its wearer. "In typical Roman fashion, the more distinguished the wearer, the more his dress was distinctively marked, while the dress of the lowest classes was often not marked at all.
In the above diagram, for example, we can deduce that the first man on the left is a Roman citizen (because he wears a toga) but is not an equestrian or senator (because he has no stripes on his tunic). Colored shoes and the broad stripes on [the third mans] tunic identif[ies him] as a senator. The laurel wreath on the head of the next man and his special robes indicate that he is an emperor, while the uniform and cloak of the following man identify him as a general.

McManus, Barbara F. "Roman Clothing." The College of New Rochelle. Aug. 2003. Sept. 2009. http://www.vroma.org/~bmcmanus/clothing.html