Bacterial Filtration Efficiency (BFE)and Differential Pressure (Delta P) Final Report Test Article: TL-B99-1TL-B99-2TL-B99-3Study Number: 864628-S01Study Received Date: 21 Dec 2015Test Procedure(s): Standard Test Protocol (STP) Number: STP0004 Rev 12Summary: The BFE test is performed to determine the filtration efficiency by comparing the upstreambacterial control counts to downstream test article counts. A suspension of Staphylococcus aureus wasaerosolized using a nebulizer and delivered to the test article at a constant flow rate and challengedelivery. The challenge delivery is maintained at 1.7 - 2.7 x 103 colony forming units (CFU) with a meanparticle size (MPS) at 3.0 pm ± 0.3 pm. The aerosol droplets were drawn through a six-stage, viableparticle, Andersen sampler for collection. This procedure allows a reproducible bacterial challenge to bedelivered to test materials. This test method complies with ASTM F2101-14 and EN 14683:2014,Annex B.The Delta P test determines the breathability by measuring the differential air pressure on either side ofthe test article using a manometer, at a constant flow rate. The Delta P test was designed to comply withMIL-M-36954C, Section 4.4.1.2 and complies with EN 14683:2014, Annex C.All test method acceptance criteria were met. Testing was performed in compliance with US FDA goodmanufacturing practice (GMP) regulations 21 CFR Parts 210, 211 and 820.