F1 - 99.9% STANDARD + ACTIVE CARBON FILTER - 3 PK / FITS M1, M2 & M2.5 MASKS
 
You want tough protection that works as hard as you do. The F1 filter is our standard protection that provides best-in-class filtration technology, filtering up to 99.9% of dust, dirt, pollen, mold spores, allergens, bacteria, and odors.
 
Superior Protection
Comfortable, Lightweight & Easy to Use
Won't Fog Glasses
One-way Discharge Valves Reduce Moisture