The only equipment deodorizer with the moxie to knockout odor in boxing gloves, shoes, gym bags, backpacks, lockers, automobile personal storage compartments, other enclosed spaces where odors exist, and much, much more. Simply twist the balls at the center to emit a refreshing, odor dissolving scent that will last for months. These small deodorizer fresheners pack a big punch to fight through the toughest odors. Sold in pairs.