... -PP material -NONWOVEN TECHNIQUE -superior filtration meltblown water filter /zero penetrationCommodityMelt Blown FabricMaterialpolypropylene(PP) fiberColorwhiteWeight10-30gsm ( ... warmth retension, noise isolation 6,superior absorbency,industrial micro-dust maskSpecificationBFE95,BFE98,BFE99 for medical mask ... R95 R99 R100 P95 P99 P100 for industrial maskStandardASTM F2100-07,NIOSH,CE EN149:2001, ...