There are no chemicals and no fragrance, which is important to me. They are safe to use anywhere! Whether you have some mildew odor or just hate the residual smell of your cat box. They can help any smell :)
I decided to put mine in my closet. I have only lived in my home 5 months. It was completely renovated. But my closet smells. The attic entrance is in the ceiling, I store my artificial Christmas tree and vacuum in there. There was a washing machine leak into the floor. So... perfect place. I have been sticking my fabric softener sheets in there to spruce it up, but you could still smell it.
RESULT: My jaw being picked up off the floor :)
No, really, I mean it! Within an hour I went back to check on the closet and it was odor free! REALLY! you couldn't even smell my Snuggle Sheet anymore! Sweetness!
So I decided to go back to Amazon and see what else they had.
My daughters stinky feet are going to bless me once school starts! They make shoe size packs!
They even have food grade charcoal on their website if you are into natural remedies! I may even grab a pack to throw under my car seat!