My son and I used ZeroTrace PureION Field Generator from Wildgame Innovations on a hog hunt recently in North Carolina. We had several hogs downwind of us within 25 yards and never got winded. Of course, we also use other scent-control measures, such as washing our clothes, gear, and bodies before the hunt. My son uses it currently during our early urban archery deer season and has had deer within 10 yards of him downwind. I cannot be 100 percent sure if it works or not since we use it along with other scent-control measures--but I am sure it helps.