I have a pair of waterproof work boots that were starting to make it clear just how little air flows through them with some ripe odors. I started putting these in there whenever I'm not wearing the boots and it cleared up the odors within a few days. It also seems to be doing a great job of absorbing moisture.

I can also attest to the remodeez car deodorizer after seeing what it did for a used car my parents purchased from a smoker. They had tried all sorts of things to get the cigarette smell out of that car, but the remodeez filter took care of it. I now keep one my car at all times, though it mostly just covers up fast food smells when I don't feel like cooking.