Unlike other air fresheners that simply mask odours, Oxy-Gen powered air freshener systems eliminate odours and replace them with pleasant fragrances using an ingredient called Neutralox which is effective on many bad odours, from tobacco and food odours to pet smells and urine/faeces. The Oxy-Gen systems contain no solvents or alcohol and no CFCs or added VOCs or propellants, just 100% fragrance oil, so is perfectly safe for all environments – and friendly to the environment!