Nature's Air Sponge contains a soap based gel with activated charcoal. When opened, the two components work together to dissipate a stream of "lighter than air" molecules into the environment, interacting with and neutralizing odor and pollutant molecules. This creates a pure, fresh, healthy air quality. Covers up to 300 square feet with an 8 foot standard ceiling. Lasts Four to Six Weeks. Scent: Neutral; Physical Form: Gel; Application: Odor Control; Volume Capacity: 1/2 lb.