Sneaker Balls aren't like any other air fresheners. They're smaller and tougher because they have to work in nasty little places where other air fresheners won't fit. Use them in your shoes, gym bag or locker for a fresh and clean scent. Simply twist to open and activate the powerful air fresheners. Each ball contains a TX-3, an odor blocker with a fresh clean scent that is formulated to counteract undesirable odors caused by perspiration. Sneaker Balls also work great in any other area where tough odors are a problem. Use them in your car, clothes basket, drawers, diaper bags, suitcases etc. . The only air freshner with the moxie to tackle the inside of a shoe, gym bag or locker - where ugly stuff grows.