Exceeds ASTM's fluid-resistant performance class specifications as a high-barrier medical face mask: PFE 99.75% @ 0.1 micron. Outer and inner fluid-resistant layers with white inner layer for sensitive skin and a high-filtration filter media. Secure Loop™ ear loops are sonically attached to outside of mask to eliminate skin irritation. Full-length aluminum nosepiece. Made in the USA. Latex-free.