A bandana also serves most of those purposes. Plus, on one Fall hike it was much warmer than I had expected and I was so overheated in my wool base layer (did not bring a light shirt) that I fashioned a skimpy "top" from two bandanas (this was a fashion trend in the 70's!). Bandanas make nice prayer flags, sweat bands, tent cord, sun shade, and you can express yourself with outrageous designs and colors.