I think there are shorts underneath. One description I read described that, but I didn't see them in any caps or stills. Sarong? No, not quite a sarong. Closer to a wrap dress. But, I think the flap/opening is mostly fake. You can see the zippers on the shoulders of the men's uniform, but the women's uniform... I dunno. It holds closed too well. *needs to watch some more*

Of course the movie completly reinvents both uniforms. And, has a crazy new textured fabric to boot.....

You would think, since it's such a huge part of the culture, that there would be a million communities. But nooo...
Yes! Exactly!