Start a fire (two ways)
1. Soak a few strands of your bandana in hand sanitizer to make a fire starter that will take a match easily and burn for a minute or more.
2. Survivalists know that semi-burnt cotton (char cloth) can light with just a spark. To make some, ignite a stamp-size piece of bandana, then snuff it out after a few seconds. Note: Making char cloth is pretty simple, getting it to take a spark is harder.
Signal for help
If your bandana contrasts with the landscape, hang it over a tree branch in an open area so it’s level and as visible as possible from the sky (and helicopter rescuers).
Make a hat