Air Purifying Charcoal Bags absorb odor & allergens prevent mold & mildew Bag is effective for up to 2 years Bags are filled with one ingredient only -activated bamboo charcoal 3 Pack Bamboo Charcoal Air Purifying Bags 3 Pack Storage Capacity: n/a Cleaning Product and Household Supply Volume per Container: n/a Fabric/Material: Bamboo Dimensions: 2. 3 Pack Bamboo Charcoal Air Purifying Bags NATURAL ODOR ABSORBER.