Earloop Face Mask - BLUE 50/Bx. Fluid Resistant Outer and Inner Layers. BFE ≥ 98% / PFE ≥ 98% at 0.1 micron. 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 Level 2. Box of 50 masks