Material: non-woven fabric
*Premium quality: Made of the premium quality disinfected non-woven fabric, comfortable and skin-friendly to use.
*5-Layers: Effectively filter viruses, pollen,dust in the air, providing you longer-term security protection.
*Make the mask become reusable: Economic-friendly and economical. Effectively prolong the use of your original PM2.5 masks.
*Easy to use: Suitable for a variety of double valve masks. After wash hand, add the pad to the mask to finish the replacement in seconds.