MATERIAL: Our reusable foam pollen filters made of blended synthetic fibers in a gray carrier. Disposable ultra-fine filters made of polyester fibers in a light blue carrier. The pollen filter is designed to filter out dust and pollen. The ultra-fine filter, on the other hand, is meant to filter out smaller particles and unwanted odors. DEEPER SLEEP AT NIGHT: Continue to enjoy a clean, fresh flow of air while you sleep with our Filters Kit, it is specifically crafted to provide you a high-quality performance every time you use them. These kits ensure your device delivers good-quality air so you can breathe better while you’re sleeping. The filters keep dust and dirt away from your machine, which can protect your health and make your device work wonders to add years to your life. HOW TO INSTALL: To install an ultra-fine filter in your machine, slide the foam pollen filter out of the machine, securely snap the light blue ultra-fine filter onto the base of the foam pollen filter, and insert them both back into the device. WHAT YOU GET: Our filter kit includes 4 reusable Pollen Filter and 20 disposable Ultra-fine Filter. The filters are made in a way that blocks out small and large particles, while the wipes are designed to remove dirt and residue from your machine. Billions of potentially harmful, invisible elements are in the air we breathe, infiltrating and challenging our respiratory health. Our filter kit is designed to help you avoid breathing in additional irritants when using your machine. It makes the air you breathe safe and healthy. It comes with 2 reusable Pollen filters and 6 Ultra-fine disposable filters, making it simple to swap out dirty trays as needed for a more hygienic user experience. Each unit is built to stop dirt and pollen, allowing you to get a restful night's sleep. Pollen filters are reusable and should be cleaned on a regular basis and replaced as needed due to wear and tear. Ulta-fine filter is disposable and should be changed regularly when soiled. Enjoy the cleanest air possible.