Multiple uses, can't hurt to have them around.
Amen to that. I always keep one on me when I'm hiking. I'll either wear it around my neck (wetted for coolness), or use it for wiping sweat off my face. In extremely hot weather (over 105 degrees F), I may even drape it from my hat to provide shade and cooling all around the back and sides of my head.

But it has many other uses as well, and is an all-around handy thing to have around!