A Shemagh is a headscarf and to use it, start by folding it so that you can have a large triangle. Next, drape it so that the triangle ends are between your shoulders but ensure one side is shorter than the other. The shorter end is pulled so that it is under the chin and the longer one goes across your face. The longer end then goes behind your head so that it meets the shorter one near the ear. Finally, tie a knot to secure it in place.
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You use a Shemagh to keep out the sun, hide your face and help to keep sand out of your eyes. Make a triangle put it on your head and take the right end across to left and left across to right. Tie in back of your head.
When you use a shemagh you begin by folding it in to a triangle. Put in on your head with the triangle to the back. Pull the front part forward. You start to wrap it around your face, tucking in the portion that is left. You can find more information here: www.actiongear.com