I liked your sincerity in questioning the dress code. Though you can wear the most sexy out fits here you might go with it, if some old arab women happened to object it, will be an embarrassing situation.

In general bad clothing is even obscene even in the west, then why do you put questions when your conscience is very clear that sexy/exposing body fitting/transparent dressing will hurt the sentiments of locals here, but your own person too.

You can put on any decent dress that will make you feel that you don't cause obscenity in public, that will be fine and respectful to both.