It all depends on the hunting conditions. The property I hunt in Georgia is devoloped around so I beleave the deer are used to smells they arnt sure of. This doesnt make them easy to hunt by any meens but I quit using ANY scent protection or attractent sent. When I went to New York however it was so over hunted that everyone in camp sprayed down EVERYTHING before going out. My only argument to this is here in Georgia I have been sitting on the ground multiple times this year and got 5-10 feet away from deer. None of which smelled me(no scents added to my clothing)and im sure at that range they should of smelled me if how most of scent protection addvertisements were on the money. Cant hurt though...