Some background:
One thing that some Christian fundamentalists (Independent Fundamental Baptists, some Pentecostals, the Amish, and a few other groups) seem to emphasize is distinction in dress between the sexes/genders. To some extent, more liberal types roll their eyes at their seemingly artificial affinity for Victorian culture and reply that even though 21st century American culture allows women to wear trousers, there are still gender distinctions in dress such as which side shirt buttons go on and we have not become a culture of women who crossdress as men but a culture where women can dress as women wearing women’s trousers and shirts. There are still noticeable differences in accessories/jewelry - for example many women wear pearl necklaces with women’s business suits while men generally wear ties with men’s business suits.
Any person capable of doing research can tell that there have been many cultures in the world where men wore skirts regularly and that there are some today, although there was/is often still a gender distinction either in the skirts worn or in other clothes or accessories worn with them. For example, many Scottish people would consider a woman or girl wearing a Modern Scottish Kilt with sporran, ghillie brogues, and sock flashes to be crossdressing as a boy or man, skirt wearing notwithstanding. It’s a boy’s skirt, duh. If you look hard enough you can even find instances of women wearing trousers hundreds of years ago.
Have there been any cultures that have maintained no gender distinction in dress? That is, have there been any cultures where either all clothing is inherently unisex, or the only distinction is that there are men’s sizes, women’s sizes, and pre-pubertal children’s sizes to account for body size and proportions but otherwise the styles are identical?