Let me introduce ya'll to an almost-universal form of desert/steppe/savannah wear: the thobe:
I hear you. Kinda boring, no? But practically everyone wore them in the 19th century and earlier. To the point where they were pretty much a standard unit of trade (the amount of tobacco or sugar you'd bought would be measured in plain white linen or cotton thobes) from Western Africa to the steppes of Uzbekistan.
Which means there are a lot of different styles.
For example, the Somali thobe:
(as a side note, check out the traditional Somali dye on this guy's hair. It's awesome. Ignore the button-down shirt, but the scarf's authentic.)
Here's a woman's version:
Or, I dunno...Yemeni thobes?
Or Sudanese thobes!
Or Khajeeli, or Punjabi, or Tajik, or or or or....
and they can be plain
Some even good enough for a noble to wear!
As a parting note, I can think of no better way for a fashionable Borsail to say, "I have more money than you," than this: