You guys don't use BUFF type tube scarves as helmet liners? Here in Korea they're completely ubiquitous for on the head and for covering your face. I have a bunch of them that I use on the bike and I throw them in my backpack for hiking for headbands and wristbands to keep as much sweat out of my eyes and off my fingers as possible. I actually only have one original BUFF branded one, and it hasn't held upas well as some of the generic $2 ones from the local equivalent of Dollar Tree or whatever.