Purchased at a Pristine physical store. I believe it was the Kichijoji store about three years ago. I had been looking for this muffler for a long time, and I finally got it after calling the Kichijoji store and having them hold it for me. I also bought a hat at the same time. I believe it was 100% organic cotton. It feels good against the skin, and I'd love to wear it myself. There are no noticeable stains, but it has been handled by someone else. Please refrain from purchasing if you are concerned.