Exceeds ASTM's fluid-resistant performance class specifications as a high-barrier medical face mask: PFE 99.75% at 0.1 micron; layer for sensitive skin that will NOT lint, tear, or shred, combined with a high-filtration filter media. Entire mask is void of all inks, dyes, and chemicals to avoid any potential skin sensitivity. Secure Loop™ ear loops are sonically attached to outside of mask to eliminate another source of skin irritation. Full-length aluminum nosepiece. Not made with natural rubber latex.