The Mini Moso Natural Air Purifying bag is the easiest way to maintain fresh, dry and odor free shoes, gym bags, luggage, and sporting equipment. Simply place the Mini Moso Bags inside the affected area and leave them in overnight. To keep the Moso Bags working at peak performance, place the Mini Moso Bags outside in the sun for at least one hour to rejuvenate. With proper care, the Moso Bags will last up to two years. Made of just one incredibly powerful, natural ingredient - moso bamboo charcoal, the Moso Bag is continuously working to remove odors, bacteria and moisture. The bamboo charcoal is sealed inside a beautifully stitched linen bag which can be placed on any surface or material. Fragrance-Free, Chemical Free, and Non-Toxic, the Moso Bags are safe to use around people and pets.