Contains Neutra-lox, a proprietary ingredient that works with fragrance oils on targeted malodors by locking in the malodor molecules, neutralizing them and releasing a pure, fresh scent into the air. Neutra-lox is extremely effective against the smell of urine, feces, body odor, tobacco, pet malodor, kitchen odor, mold and mildew, etc. Unlike other systems that only mask odors, Oxy-Gen Pro cartridges eliminate odors and releases fragrance effectively. Can be safely disposed of in a plastic recycling bin at the end of the cartridge life.