Ear-Loop Face Mask - Blue. Fluid Resistant, BFE > 98%, PFE = 99.7% at 0.1 Micron, Latex Free, Extra Long Aluminum Nose Piece, Aluminum Strip Under the Chin to create a custom fit with a tight seal at the bottom and sides of the mask. Conforms to any size or shape face. ASTM High Barrier 5. Box of 50 Masks. Box of 50 masks