Love this stuff. Maybe it's all hype, but I DO notice a difference. Wasn't expecting much when I decided I'd give it a try, but so glad I did. So much easier to work with than Japanese cotton. It may be a bit more expensive, but I get frustrated with wicking and worth it to me to not use stock coils so much on my Toptanks that last only a couple days (sweet ADV juice) and can start using the rba again. I did try rayon, but didn't care for it.