Ya I saw that on another site, can't help but think it would be uncomfortable but I bet you'd get a ton of attention.
I saw something similar in Walmart, in the hunting section. It was a mask with what looked like copper wool in the mouth piece area. Weird shit. I almost wanted to buy it as a novelty but it was like 50 bux.
I think that is so deer can't smell your chewin' tabbacky.