Offers the protection of patented LONCET breathable film to protect against exposure to blood and body fluids. ASTM Level protection.ASTM F2100-11 GuidanceFacial protection can be as easy as 1, 2, 3. Masks that comply with ASTM F2100-11 guidlines for fluid resistance are designated with Level 1, or protection, making it easy for you to select the mask that suits the task. Level Low Fluid Exposure Level Moderate Fluid Exposure Level High Fluid ExposurePackage of 40