drying patch

Do they still make the drying patch's that go around your hat? Remember seeing them years ago but don't seem to be common anymore.

Here are a couple. Don't know if they're the same or not...

http://www.kaufmannsstreamborn.com/C...ds/WAPHATBAND/

http://www.yagersflies.com/woolhatband.html

That's what I'm looking for. Thank's!