Being in the military and wearing those damn suits, I can tell you that they are only effective for a few weeks. They may hold your scent for a bit longer then that, but I don' t know of any test that says otherwise. The best cover scent I found is to stand in camp fire smoke. I have personally seen that it works just as well as all that " scent loc" stuff. We had a 57" spread bull moose walk in on us as well as a grizzly without breaking stride, and you know how well a bear' s sense of smell is. I know that E-bay sells them and most pawn shops if your are really wanting one.