ASTM Level 1 (Fluid Resistance). 99% Bacterial Filtration Efficiency (BFE). Small Particulate Filtration. Not Made with Natural Rubber Latex. Soft 3-Layer Nonwoven Material. Protects Caregiver and Patient. Ideal for Home Healthcare. Easy on Elastic Earloops. Moldable Nose Strip. Easy Breathability. This mask helps keep patient's illness from spreading to caregivers and others. This mask will not work for gases, vapors, odors, or oil particles.Do not use in spaces where high concentration of toxic substances can occur. Single use only. Used masks should be disposed of immediately. Never share a mask with someone else. If mask becomes wet from saliva or other respiratory fluids, change immediately and use a new mask.