Keeps rooms fresh, dry, and odor free. FRAGRANCE FREE, CHEMICAL FREE, NON-TOXIC. Removes odors, allergens, and harmful pollutants. Absorbs excess moisture. Great for pets, auto, closets, boats, bathroom, and home. Helps prevent the growth of mold, bacteria, and mildew. Re-use up to two years. Place this bag in direct sunlight once a month for at least one hour to re-activate ingredients.