I hope everyone will forgive me for reopening the old thread and then hijacking it (!) but it SEEMED relevant to me...
After I asked, "What's a Buff?" I ironically have tried one and love it.
After I first asked I seen them in a store and picked one out and told the wife I was going to buy it, but I've NEVER worn a bandana in my life, so she suggested I wouldn't wear it. I finally put it back as I DIDN'T wear bandanas or "do-rags" of any sort.
However, I was hiking a couple weeks ago and the sweat was rolling. Years ago, it never bothered me-it was no more than water in my face, but as I've gotten older, it DOES bother me. I doubt the sweat has changed...it's probably my eyes, as I now have "dry eye" syndrome and they are very sensitive. I finished out that day with a real bandana that I had on the pack, but had to tie it tight behind my big noggin and it kept sliding down, or coming untied. I decided then that a Buff was in my future, and I picked up a UV Buff a few days later. Thursday was the first hike I'd carried it on... After the initial climb, I was starting to sweat and I whipped it out. I first wore it in simple tube fashion, but was distracted by it blowing around the back of my neck. After that I flipped it into the "pirate" mode to tighten the profile against the head. I wore it like that the rest of the day and I never even noticed it, but it didn't allow a MOLECULE of sweat to roll off my brow. LUV IT!
And a cool pic: