Cotton, Non-woven fabric and activated carbon.
	
Usages: filter air, let you breathe fresh air, keep away from PM2.5, air pollution, dust, etc.
	
Mask filter, insert PM2.5 carbon filter from inside the mask, suitable for outdoors.
	
Activated carbon filter: filter fine dust and particles.
	
Recommended that each filter should be replaced every week if used a lot.
 
*These are carbon filters, they are not medical grade N95 filters.
*Filter fits inside all sized masks.