I got these to use in the closet where we keep our shoes after a few days I was not seeing a difference and it disappointed me. Then when I read through the reviews I saw that they first need to be placed in the sun for an hour in order to activate them. After I did that I really started to notice a difference. Now I have no more stinky shoe smell. Also, make sure to stick them out in the sun once a month for an hour. This is available on Amazon . I received this product at a discounted rate in exchange for a honest review.