Well I'm not a nay-sayer..And I'm the guy who'll buy every new gadget or gimmic out there. I just cannot name one instance where my breath was the only likely culprit of me getting busted. I chew copenhagen and generally carry a spit bottle, but when I forget, it I spit on the ground. I've not had any deer spook because of this.

It seems I ignore breath,But I am in scentlok from my feet to the top of my head. I guess I do breathe through a scent-lok mask so maybe that helps?? Dunno. But if you think of say regular breath versus some minty fresh toothpaste which has more smell?? Gum-o-flauge may work, the jury is still out..but i bet the cashier gets a chuckle everytime she rings it up!