Crosstex™ Ultra™ Earloop Mask PreviousNext Crosstex™ Ultra™ Earloop Mask GCFCXU-HF ASTM LEVEL 3. Fluid-resistant construction. Ideal for procedures where heavy to moderate amounts of fluid, spray and or aerosols are produced. Blue, 40/box. Where to Buy x Category Dealer PartnersSales RepresentativeStrategic MarketsSchools RepresentativeAccutron™ Equipment Sales Zip Code Find RepresentativeReset Select a category, input a zip code and click on Find Representative, or explore the complete list here.