Level 3 - 3ply Mask * Blue * Bx/50 * Adjustable Nose Clips * The 3 Layer Design Provides Bfe And Pfe > 85% * One Size Fits All * Ultrasonically Welded Earloops Stay Firmly Attached * Tested For Quality * Outer And Inner Layers - Spunbond Nonwoven Polypropylene * Filter - Meltblown Nonwoven Polypropylene * Straps - Polyester Elastic Cord * This Mask Contains No Components Made From Natural Rubber Latex * Astm F2100 - Level 3 * The3layerdesignprovidesbfeandpfe>98%adjustablenoseclipsignificantlyreducesairpenetration ultrasonicallyweldedearloopsstayfirmlyattached testedforqualityintheunitedstates Materialcomposition outerandinnerlayers?spunbondnonwovenpolypropylene filter?meltblownnonwovenpolypropylene straps?polyesterelasticcord noseclip?polyethylenecoatedgalvanizedwire thismaskcontainsnocomponentsmadefromnaturalrubberlatex approximateweightofproduct:3.0grams/0.10oz