A friend of mine, a devout Episcopalian, went to Egypt. After a couple of days, she got tired of brushing sand out of her hair, and bought a white cotton veil, which she wore on her head for the rest of the trip. It was also useful for covering her face during sandstorms.
The veil was a practical garment, that gained religious significance.
When I see Islamic women in the U.S. with their heads covered in polyester, I find myself yearning to scream, ARE YOU CRAZY! THAT'S SYNTHETIC! YOU MUST FEEL LIKE YOU STUCK YOUR HEAD IN A BROILER! There are no sandstorms in Pittsburgh.