Bx/35 N95 Masks * Size: Regular * Provides a minimum of 95% filtration efficiency of 0.3 micron particles (N95 rating) * NIOSH approved * Made with a fluid-resistant layer and a combination of materials to resist fluid penetration; ASTM Level 3 (Heavy fluid protection) * Two polyurethane headbands secure the mask to the face to help ensure a tight facial seal and prevent leakage around the mask edges * Large  pouch-style breathing chamber and So Soft lining for added comfort *