Developed over 20 years ago, Air Sponge has been successfully used in a wide variety of large scale commercial applications but was only recently packaged for everyday household use. Already it has satisfied millions of customers! Why? Because it works! Non-Toxic. Biodegradable. 100% Environmentally Safe! Absorbs pollutants and eliminates odors up to 300 square feet. Use in the home, workplace or auto. This product is very popular for eliminating musty basement odor.