Camco Air Purifying Bamboo Charcoal Bag, Captures and Eliminates Odors in Cars, Closets, Bathrooms, Pet Areas, Shoes, 500g Bag Conveniently maintain a fresh, dry and odor free environment. Perfect for RV, Mobile Home, Car, Boat, Locker, Garage, Pets Non Toxic, Non Fragrant, Chemical Free 100% Bamboo Charcoal To rejuvenate and re-activate place the bags outside in the sun once a month for about an hour.