The Jason Markk Premium Moso Freshener Shoe Inserts will work to remove odors, bacteria, pollutants, allergens, mold and mildew from your shoes. These Bamboo and Charcoal deodorizers will neutralize odor in a few days. They’re all-natural, completely fragrance free and non-toxic. To recharge them, place them in direct sunlight for one hour, once a month. Each sachet can be recharged up to twelve times. The perfect gift for any sneaker lover!