I prefer not to have too many rules on that tbh. Please don't make Invicta go into that uniform direction.Seeing that singlet makes me think that the commission needs to get involved in women's attire a bit. Guys have minor changes, but women are literally all over the map.
Coming out in like turtlenecks and all sorts of different things. Maybe there isn't much you can do but things need to be lowered down. Seems strange to let that many variations in the cage.
Of course there are some exceptions, like Tiburcio's shirt/top a while back, where probably someone either from the commission or Invicta should have stepped up and said "no stop, that's not proper fight attire".
But unless it's dangerous or giving unfair advantages or is really inappropriate in some other, I think choice of clothing should be up to the fighters.
Also I don't really see the problem with singlets (apart from this particular singlet being a serious crime against fashion).
Shouldn't they be the pretty ideal clothing for fighting? Especially when grappling is involved...