The handkerchief, also referred to as a hankie or dew rag, is a simple piece of cloth with many uses.
Handkerchief Types and Similar items
The typical "hankie" comes in several relatively small sizes and is intended for mucus reception duty, while useable large version are more versatile.
A 24x27 piece of cloth generally a courser cotton fabric, their large size makes them more versatile.
A shemag is a much large piece of fabric large enough to create a full head wrap, they are often too big for a pocket, but their great size makes them even more versatile.
A handkerchief held over the mouth and nose will keep the majority of any particulate matter or smoke from being inhaled, they are made more effective by being doused in water first.
If folded properly, or if you have a handkerchief with a small pocket on the corner, you can load with keys, spare change, rocks, or any other small heavy objects to be used as a flail.
A handkerchief can be folder in several way to create a pocket which can be place inside of a pant or other pocket to help you stay organized.