Competition and Market/Product Differentiation The competition of Healthier Sciences is Febreze that is a bright spot for the company. Febreze reached its billion-dollar milestone even as the U.S. home air-freshener, potpourri and sachet category fell sharply in recent years. Last year, sales for the category came in at $915.3 million, down 8% from 2007, according to market-data firm SymphonyIRI..