It"s called a fanny pack, belt pack, belly bag, Buffalo pouch, hip sack, hip pack, bum bag, Joe bag, man bag, or whatever you want to call. One thing is for sure, it"s proven to be a travelers best friend. Fanny Packs are useful for keeping valuables things like money, ID"s, and Passports close to you at all times when you"re traveling. They"re also good for easily accessing items you use regularly like pens, notepad, makeup, money, and more.