Earloop Masks - WHITE 50/Bx. Fluid Resistant Outer Layer, White Tissue Inner Layer, BFE ? 98%, PFE ? 98% 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. Extra soft. Free of chemicals, inks and dyes. ASTM Level 3.