Combat that odour. Simply fill knee-high stockings with unused cat litter, tie the ends and tuck them in overnight for a quick refresh. I'm thinking it wouldn't hurt to add the baby powder here too!
Another refresher for smelly sneakers is to simply take a few teaspoons of baking soda and put in the center of a cotton cloth. Tie the cloth and rubber band the edges securely creating a baking soda sachet, which you put in the shoes overnight as well. These sachets can be used over and over in any kind of shoe.