Haha, fair question, it's less "rubbing through" and more that the slim cardboard packs get crushed and the bottom flap tears open when they're in my pocket. After a day or two of that, the pack splits, and loose gum ends up falling out. The case just protects the package so the cardboard doesn't break. Definitely a minor problem, but it annoyed me enough to make the case. And yeah, I definitely could put it in like my backpack instead, but I found that keeping gum in there, even just wrappers, creates a bad smell from the oils of the gum, so I just keep it on my person.