Please do message me for your choice of fabrics as I have probably far to many to admit!
There is space for a filter in between the two layers
May I recommend the following
Wear the face mask properly, ensure no air is breathing in from sides of the mask.
Handle the face mask carefully, wash it thoroughly every day. Do not touch the contaminated side of the face mask, wash your hand if you accidentally touch it. Always keep good hygiene by washing your hands thoroughly with soap, don’t forget the fingernails and up till the elbows.
Wear safety goggles if needed and avoid rubbing your face, eye, and nose at any cost.