<b>Benefit of Changing the Air Filter</b><br><br> * Effectively filter more dust, dirt and po-llen, which can help screen out dirt, dust and fine particles. <br> *Have an incredibly positive effect on sleep and overall health of lung. <br> * Not only good for your health, but also improve and extend the quality of the machine. <br><br> <b>We provide two versions of filters in One Set</b><br>*6 Assembled Foam & Fine Filters <br> * 20 Pcs Foam Filters <br> * 20 Pcs Ultra Fine Filters <br><br> <b>About Foam Filters</b><br> * The foam filters is to block large particulate matter.<br> * Dense which can better block more dust, po-llen and etc..<br><br> <b>About Ultra Fine Filters</b><br> * The ultra fine filters is to block fine particles.<br> * Denser compressed which can achieve better filtration effect for ensuring fresh air.<br><br> <b>Product Material:</b><br> Slot: Polyamide<br> Foam Filter: Polyethylene Terephthalate<br> Ultra-fine Filter: Polypropylene<br><br> <b>Attention:</b> <br> Please Note the reusable filter may not hold firmly to the Disposable Fine Filter for your machine, but to ensure optimal performance, the filters can be held together when installed into the machine.<br><br>