im sorry, but i thought that wind powder stuff was just a gimmick. I can tell the direction of the wind by feeling it on my face or the classic lick your finger and hold it up.
How much of a gimmick is knowing what your wind is doing 30 yds from you?
Powders don't tell you much at all but whats 1 foot In front of your nose. Use Milk weed after It drys out. You will get a much better wind perception.
Schultzy...I can watch the puffer cloud for 30 yds or more.