Hedy SoftMask Defender combines a level 3 barrier mask with an additional anti-bacterial layer for the greatest protection available in a facemask. Description: Anti-Bacterial layer filters harmful bacteria ≥98% Particle filtration efficiency PFE at 0.1 Micron ≥98% Bacteria filtration efficiency BFE at 3.0 Micron Resistance to penetration of synthetic blood of 160mmHg Non irritating to skin Omega pleated for larger breathing chamber which provides better breathability 100% non-latex earloops Fluid and splash resistant Tested in accordance with ASTM standards 50 masks per box Materials: Polypropylene Non-Woven, Non-Latex, Fibreglass-Free.