Widely used 3M 1860 Surgical MaskNIOSH Approved: N95Meets CDC guide Mycobacterium tuberculosis exposure control.FDA Cleared for use as surgical mask.>99% BFE (Bacterial Filtration Efficiency) according to ASTM F2101.Fluid resistant according to ASTM F1862.Helps protect against certain airborne biological particles.Respirator contains no components made from natural rubber latex.Collapse resistant cup shape design