TFB Review: SOTR - Ops-Core's New ... - The Firearm Blog
Oct 20, 2020·The N95 filter is designed to filter out 95% of particles .3 micron or larger and is not oil resistant. The filters used in the SOTR mask are P100 filters, boasting a 99.97% filter rating. This includes lead, asbestos, lubricant mist, and explosive gunfire residue. The P signifies that the filter is oil-proof, unlike the N95 masks.