Technical Specifications 4 Ply, added meltblown, Latex Free, Hypoallergenic, Fiberglass fee, Fluid Resistant, Three Ply construction. 3 pleats of folds to allow the user to expand the mask so it covers the area from the nose to the chin. Mask should be secured with an ear loop to be placed behind the ears. >99% Bacterial Filtration Efficiency (BFE) at 5 micron capacity; >95% Bacteria Filtration Efficiency (BFE) at 3 micron capacity. Reduces exposure to blood and body fluids. Minimizes patient contamination to exhaled microorganisms. This product is intended for use in infection control practices.