Look at a buff and think why the heck would someone use that...  Then get one and use it and you will be left wondering why the heck weren't we issued these when we were born.  Uv Resistant keeps me from getting a sun burnt red neck, Insect Shield keeps me from annoying bugs.  And the buff cools my neck, shields from dust, protects from wind, keeps me warm, soaks up sweat, and is just awesome all round.  I wear it fly fishing to keep the bugs from eating me alive and sun from burning me up.  Soak in in water and wear it around the neck to cool while riding my bike or motorcycle.  Keeps my lips and cheeks from getting chapped on windy days, and keeps dust out of my mouth and nose in the desert.  I've bought a few to give as gifts,  Light weigh, multiple use tool that finds it's way into my ultralight backpacking equipment.

Recommend you try one, you'll love it.