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This study was conducted to investigate the protection of disposable filtering half facepiece respirators of different grades against particles between 0.093 and 1.61 m. A personal sampling system was used to particle size selectively assess the protection of respirators. The results show that about 10.9% of FFP2 respirators and 28.2% of FFP3 respirators demonstrate assigned protection
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Jun 05, 2018 Wearing a DIY, mask with removable filters or surgical mask will also not protect you because these masks do not have effective filters for capturing micro particle. The material and technology used in Cambridge masks make them an effective means of filtering PM2.5.
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