3 Layer Disposable Medical Mask Execute standard: EN 14683:2014 IIR, ASTM F2100 Level 1 BFE: Bacterial filtration efficiency : 95%, This protective face mask is suitable for filtering dust, droplets, and other harmful particles in the air. May reduce virus inflation rate by serving as an additional barrier between individuals. Improves upon good social- distancing practices. Material: Made with melt-blown, nonwoven electrostatic cotton. Outer layer non-woven: water and fluid barrier Middle layer: core filter by meltblown film Inner layer :non-woven fabric as hygroscopic layer