The key to protection is in the mask's filter. When you breathe with the mask on, air passes through five important layers of protection before it reaches your lungs. Each layer has a different density in order to filter particles of different sizes. The multi-layer filter technology consists of the following layers:
Outside PP Layer: Outside filter wrapping in a durable finish
Active Carbon Layer: Filters gases and reduces odor
1st Electro Charged Layer: Filters larger PM10, pollen and other allergens
2nd Electro Charged Layer: Filters smaller PM2.5, dust and bacteria
Inside PP Layer: Inside filter with ultra-smooth and skin-friendly finish
The filter is replaceable and lasts for about 100 hours. Each mask includes 2x filters.