These medical masks have 2 layer of PP melt-blown fabric (50g/sm thickness), similar to an FFP3-standard layer (>99% bacterial filtration @0.1microns). Our TUV inspection report actually shows 100% BFE from the sample testing. With a unique 3D design for better fitting, giving complete isolation of mouth and nose much more comfortable for all-day wear, high-quality material layers to ensure added breathability and moisture absorption from exhalation completely fluid-resistant, impermeable to liquids and aerosols and fire-resistant. Type IIR EN 14683:2019 certified. CE certificates.