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! 2 pack of 75g Bamboo Charcoal Air Purifying bags are the perfect size for shoes, hockey skates, rollerblades, ski boots, and more! This compact size also allows for uses in other small areas such as backpacks, diaper bags! The bags are perfect for pet owners 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.