This Bamboo Charcoal Air Purifying Bag is the all-natural way to keep areas fresh, dry and odor-free. Natural bamboo charcoal absorbs allergens, pollutants and excess moisture to help prevent mold, mildew and bacteria from forming. Non-toxic and free of chemicals and fragrances, it's great for pet areas, closets, basements, bathrooms and more. Works effectively for up to two years – to rejuvenate, simply place the bag in direct sunlight for an hour each month. 6 1/4"L x 5 1/2"W x 1 1/2"D.