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. Last Up To Three Months. Scent: Neutral Physical Form: Gel Application: Odor Control Capacity Volume: 16 oz.