PureGuardian Bamboo Charcoal bags are a natural way to continuously absorb and reduce odors, excess moisture, and harmful pollutants in your home or space! Unlike other popular odor eliminators that solely mask the smell of odors by releasing a fragrance, the chemical-free and non-toxic bamboo odor bags are fragrance free. Each bag can be reused for up to 2 years. To recharge, simply place the bag in direct sunlight once a month for at least 1 hour, to release any odors and trapped toxins inside of the bags pores. After an hour, your bag will work as good as new! The bamboo charcoal bags are perfect to us in bathrooms, closets, smelly shoes, pet areas, laundry rooms, basements, cars, gym bags, offices, boats and more! The bags are perfect for petowners who want to eliminate unwanted pet odors without any maintenance. They can be placed next to litter boxes, cages and crates to deodorize the smell of your pets. The bags compact design allows them to be easily portable for travel and small spaces.