Developed in ancient times in the sunny Mediterranean, where, you know, their under parts could use a little airing out in the summer, the tunic was an androgynous, multi-purpose and free-flowing garment that covered the body down to the knees or lower. The tunic was worn by all of the genders, either as the bottom layer for a more elaborate outfit or by itself if one had some gardening or some warring to get done.