: A black cord used to keep the keffiyeh or ghutra in place on the head.

: Similar to the keffiyeh but typically plain white and made of lighter cotton.

: A general term for headscarves worn by Muslim women to cover the hair and neck.

If you meant used in the Arab world, here are the most common items: Traditional Head & Face Coverings

The term is celebrated on October 14th to commemorate the founding of the Arab Postal Union. Collectors often look for "First Day Covers," which are specially designed envelopes with stamps cancelled on their first day of issue, such as those from the Egypt Post.