MaskEnomics™ Level 6. Exceeds ASTM's fluid-resistant performance class specifications as a high-barrier medical face mask: PFE 99.95% at 0.1 micron. NIOSH-approved meeting guidelines for TB exposure control and other airborne pathogens. Outer and inner fluid-resistant layers with white inner layer for sensitive skin. Dual headbands, combined with full-length aluminum nosepiece and chin piece, provide secure fit that will fit any size or shape head. Made in the USA. Not made with natural rubber latex.