Young Brunette Girl Wearing Undergarments At The Mirror At Home

The loincloth is the simplest form of underwear; it was probably the first undergarment worn by human beings. In warmer climates the loincloth was often the only clothing worn (effectively making it an outer garment rather than an undergarment), as was doubtless its origin, but in colder regions the loincloth often formed the basis of a person's clothing and was covered by other garments. In most ancient civilizations, this was the only undergarment available.
A loincloth may take three major forms. The first, and simplest, is simply a long strip of material which is passed between the legs and then around the waist. Archaeologists have found the remains of such loincloths made of leather dating back 7,000 years. The ancient Hawaiian malo was of this form, as are several styles of the Japanese fundoshi. Another form is usually called a cache-sexe: a triangle of cloth is provided with strings or loops, which are used to fasten the triangle between the legs and over the genitals. Egyptian king Tutankhamun (1341 BC – 1323 BC) was found buried with numerous linen loincloths of this style. An alternate form is more skirt-like: a cloth is wrapped around the hips several times and then fastened with a girdle.
Men are said to have worn loincloths in ancient Greece and Rome, though it is unclear whether Greek women wore undergarments. There is some speculation that only slaves wore loincloths and that citizens did not wear undergarments beneath their chitons. Mosaics of the Roman period indicate that women (primarily in an athletic context, whilst wearing nothing else) sometimes wore strophiae (breastcloths) or brassieres made of soft leather, along with subligaculae which were either in the form of shorts or loincloths. Subligaculae were also worn by men.
The fabric used for loincloths may have been wool, linen or a linsey-woolsey blend. Only the upper classes could have afforded imported silk.