Which you will only use until the someone discovers the next best wicking material lol. I still have a ton of organic cotton purchased before the KGD discovery. As far as the QC issues on my 454, the manufacturer basically told me to contact the seller and the seller of course does not respond. I got it from ebay because I had some money in my paypal. I was hoping the manufacturer would take care of it because it looks like a QC issue. I might just have to build it tonight if the seller still doesn't respond. I'll post a pic of my build when it happens.