... width -NELSON lab ,NOISH ,TSI-8130 tester Meltblown nonwoven air filterwe have approval of NELSON LAB and NOISH .CommodityMelt ... -pull,anti-bacteria, high tensile strength ,chemical resistant breathable,air permeable,absorb oil & alcohol non-toxic,non-musty,anti ... bag 5,warmth retension, noise isolation 6,superior absorbency,industrial micro-dust maskSpecificationBFE95,BFE98,BFE99 for medical mask N95 ...