The toga, a distinctive garment of Ancient Rome, was a sash of perhaps twenty feet (6 meters) in length which was wrapped around the body and was generally worn over a tunic. The toga was invariably made of wool, and the tunic underneath was often made of linen. For most of Rome's history, the toga was a garment worn exclusively by men, but in and after the 1st century BC, women were expected to wear the stola. Non-citizens were forbidden to wear a toga.
The toga was the earliest dress clothing of the Romans, a thick woollen cloak worn over a loincloth or apron. It was taken off indoors, or when hard at work in the fields, but it was the only decent attire out-of-doors. (We learn this from the story of Cincinnatus: he was ploughing in his field when the messengers of the Senate came to tell him that he had been made dictator, and on seeing them coming he sent his wife to fetch his toga from the house so that they could be received appropriately.
So important was the toga to Roman life that Augustus, upon seeing a meeting of citizens without the toga, quoting Virgil's lines, "Romanos, rerum dominos, gentemque togatam" ("Romans, lords of the world, the toga-wearing race") and ordered the aediles to deny entry to the Forum or Circus to any citizen without his toga.