The bacteria that grows in your mouth is what puts off the nasty breath smell. I dunno i guess if i sat on my stand with my mouth wide open i might use a gum o flauge,, but i cant think of one time on the stand i had my mouth open?? who actually keeps there mouth open while hunting LOL. So i just dont see the need for no crazy gum o flauge. Heck you watch hunting shows on TV, those guys talk to the camera man while the deer is walkin up.