Batman knows a thing or two about the Batman Air Freshener 2-Pack. Why? Mainly because he has to use them all the time. That Batmobile is mostly air tight so after a long night of running around, beating up bad guys, and thinking intensely about varying ways to defeat the Justice League should they go rogue, one can get a little ripe! See where I am going with this?At 4.25 inches across, the Batman Air Freshener 2-Pack has not just one but TWO black and yellow Batman symbol air fresheners that smell ever so faintly of justice which in this case happens to be vanilla. No real surprise there, right?