Get extra protection with this fashionable Panthra face mask. The face mask comes with 2 carbon PM 2.5 filters you can easily insert into the mask. It concerns special particulate matter filters (PM is short for Particulate Matter, 2.5 for a fraction of dust particles with an aerodynamic diameter smaller than 2.5 µm.) This filter consists of 5 different layers so it also protects against fine particulates. Think about condense and mist, industrial pollution, exhaust, dust, second-hand smoke and even pollen. The filters are for single use and can be used for up to 8 hours. You could of course cut a new filter that fits the face mask, but it works great without a filter as well. The face mask has adjustable loops which makes it comfortable around the ears. The face mask is machine washable at 60 degrees. How do you use PM 2.5 filters Before you remove the filters from the package, it's important to wash your hands thoroughly. Think about the 20-seconds rule to wash all bacteria from your hands. Remove a new filter from the package. Put the face mask on the table in front of you, the inside facing you. Hold the filter so you can read the letters PM 2.5 on the filter. This is how you insert the filter into the face mask. Are the letters upside down? Then turn the filter around so the right layer will be in the front of the mask. Now place the filter on the inside of the mask, underneath the white fabric. Make sure to completely smooth out the filter so it has no wrinkles.