Why do you find the fact that Sarmats wore turbans so hard to believe a.k.?
Because I've read many books about Polish costumes and fashion and there was no mention about turbans :) Look, you're the only one here who claims sawing them.
Anyway it is true that the Polish nobles choose a turkish look for a while.
Rather for a long while :) Yes they were wearing costumes that were of oriental roots, probably the fashion of them reached Poland via Hungary. However it evolved into something unique. Certainly Polish nobles in XVIIIc. liked to wear Persian/Turkish shashes. Shortly such shashes started to be manufactured on Polish lands with less oriental design. No turbans were worn.