BlastAway? is a botanical solution mainly made from corn and potatoes. The ultra-fine particles (3-4 nm) continuously bombard with the odor sources which denature them permanently into odorless substances. It?can against stubborn odor (including tobacco, mildew and sweat smell). It must spray onto object instead of spray into the air like an air freshener.   ? Qualified as an USDA's BioPreferred? solution