This Filter is to be used for Mask : Petty Officer William, Master Chief Jake, Captain Lucas
The mask filter protects you through 6 layers of material.
The combined thickness of the layers creates different density. Low permeability to aerosols. No medical filter.
Easily replaceable and lasts for 4 hours.
Option 1: Put in boiling water for three minutes.
Option 2: Put filters in a pot. Boil water in a kettle
and pour it into the pot over the filters. Wait 3 minutes.
Suitable for 10 washes.
wash + reuse = environmental protection + save money