front side 562 while also lying adjacent the sides the advantages of this embodiment may be an embodiment free of fastening mechanisms as the scented fabric would just slide on and around the fan blade enclosure double scenting the airflow as both the intake and exhaust air would be scented and longer lasting as the user could shift the sleeve position so that the portion of the scented fabric adjacent the enclosure sides shift to lie adjacent the front or back sides if the path of the airflow as the scented fabric would be a single piece that surrounds the enclosure it would not be removed from outside forces such as airflow from the fan preferably the scented fabric comprises a substrate which may be made of natural fibers synthetic fibers or a mixture of natural fiber and synthetic fibers exemplary natural fibers that can be used to form the substrate include wood fibers and non wood natural fibers such as vegetable fibers cotton straw canes silk animal fiber grasses hemp and corn stalks nonwoven fabrics for use with fig5 are broadly defined as sheet or web structures bonded together by entangling fiber or filaments and by perforating films mechanically thermally or chemically they are typically flat porous sheets that are made directly from separate fibers or from molten plastic or plastic film some examples of nonwoven materials are staple nonwovens spun laid nonwovens and air laid paper woven fabric is a cloth.