The Odor Absorbing Travel Pouch features bamboo charcoal that can help absorb odor and keep any space fresh. These reusable bags work great anywhere, in our suitcase, your gym duffel, your shoes, or even in your car. Instructions on the reverse side of the woven label help guide users on how to use the piece. Place the pouch outside for an hour once a month to “recharge”. The bamboo charcoal is good for up to 2 years.