... -10-90gsm OEM -BFE99,NOISH MELTBLOWN NONWOVEN LIQUID FILTER 99.97%EFFICIENCYCommodityMelt Blown FabricMaterialpolypropylene(PP) fiberColorwhiteWeight10-30gsm ( ... 5,warmth retension, noise isolation 6,superior absorbency,industrial micro-dust maskSpecificationBFE95,BFE98,BFE99 for medical mask ... N100 R95 R99 R100 P95 P99 P100 for industrial maskStandardASTM F2100-07,NIOSH,CE EN149:2001, ...