Gym bags & lockers. Odor blocker. Sneaker Balls aren't like any other air fresheners. They're smaller, tougher and rounder. Why? Because they have to work in nasty little places where other air fresheners don't fit. TX-3 is specially formulated to fight the unpleasant smell of human perspiration. They are the only air fresheners with the moxie to tackle the inside of a sneaker, gym bag or locker - where the ugly stuff grows! Sneakerballs.com. Please recycle. Made in China.