RE: What do you use to check the wind direction when hunting?
I think you can find that stuff in most "hunting" stores.
It's just a small plastic bottle with a dropper style head that isfilled with fine, un-scented talcum powder or chalk.
That other stuffthat "ducsause" is talking about is extra fine polyester fibers. That's a little harder to find. I've only ever seen it at Cabela's, etc.