Perhaps this review is poor simply because I have a sensitive sense of smell, but these sneaker balls really only mask the smell (you can smell it still through the baby powder scent). I was hoping to buy something that would kill the bacteria that cause the stinky foot smell, but these were a disappointment. The sweat on your foot doesn't stink--it's the bacteria that thrive there and create waste (ewww). I was hoping to get something that would eliminate the smell all together by killing the little critters rather than just covering it up. What a waste of money.