Three layer filter disposable medical mask provides a physical barrier to prevent the direct penetration of pathogens, microorganisms and particles. Outer layers are non-woven fabric, plus a melt blown fabric inner layer, hot pressed with adjustable nose clip and elastic ear loops. Rated level 3 surgical, certifications: FDA - D375218; CE - G2S0681940008REV.00. Box of 50 masks $10.00 or $0.20 per mask.