A lot of people don't know the rationale for a magic marker or sharpie. Write on the victim's forehead TK for tourniquet, or what ever you did. It. could be life or limb saving. Having it on the forehead is difficult to miss. And we need to list what is essential in a first aid kit, sometime I need to do that as well. I have forgotten a lot since I was in the medical field but there are some things never forgotten.mini Sharpie,