Nobody knows 100% if it works! I'm no wingnut hunter that hauls around a bunch of chit in the woods and set off tink bombs etc... I Always hunt the wind but that doesn't mean that's the way the deer are coming in. The ONLY reason I bought one was several good friends/excellent hunters, one in which is a producer for one of the most popular hunting shows (and no they are not sponsored by them) swore by them! They always use them but do not let the camera's show them. I'll give you one example...my last day in IL last year i had a SW wind and the deer should have been coming due south, they didnt, they popped up 20-25 yards behind me directly downwind...they was uphill from me so they was close to eyelevel when they came out...they fed in that spot for prob 5 minutes and slowly worked their way away from staying directrly downwind the entire time...20 min later they were 40-50 yards from me still feeding..never smelt me...about 20 min after that, i had 3 bucks come from the same spot except they fed the other direction and went upwind of me...I'm 99% convinced that if I wouldn't of had the ozonics, both groups would of prob busted me, for sure the does because they stayed downwind of me so long. Maybe it was a coinsidence but I'll always use it.
It takes up about as much room as my binoculars in my backpack and doesn't weigh anything.
