What are the best 40MM Gas Mask Filter's & How Do I Choose??

After spending many years around CBRN equipment and spending countless hours researching what gas mask filters are the best we have come to the conclusion MIRA is the best and its made in the EU not a country we might end up fighting in the future....take it how you want but I trust the EU more than the others.
Link for filters:
Standard P3R Filter:
amzn.to/3szQ3k2
CBRN Filter:
amzn.to/3Quup90
Smoke & Carbon Monoxide Filter:
amzn.to/3MzJRzu
‪@MIRASafety‬