Crosstex-GCFCXS Ultra™ Sensitive Earloop Mask (Box of 50/Case of 40 Boxes)Crosstex GCFCXS Ultra Sensitive Earloop Mask (Box of 50 Case of 40 Boxes) Ideal for procedures where heavy to moderate amounts of fluid, spray and or aerosols are produced. ASTM LEVEL 3 Fluid Resistance= 160 mmHg BFE > 98% at 3 microns PFE > 98% at 0. 1 micron DELTA P, mm H2O cm2 <5. 0 Meets EN14683 Rating Type IIR Standard White hypoallergenic cellulose inner layer Fluid resistant outer layer Extra soft will not lint, tear or shred Free of chemicals,