Sneaker Basketball Refresher 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. 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! Sneaker Balls also work in cars, clothes hampers, diaper bags or anywhere that odors are a problem. The scent lasts for 3 months.