200 Kimtech™ M3 Sterile Pleat-Style Masks (10 Bags of 20), 7” / One Size, White Excellent bacterial and particle filtration efficiency; Post-sterilization BFE of 94.1% at 3.0 micron and 89.3% PFE at 0.1 micron Knitted earloops and a fully enclosed, soft, bendable nosepiece Made of a...