AllergyZone NIOSH N95 Cone-Shaped Respirator Mask for Fire Smoke Pollution, 10 Pack NIOSH N95 masks filter out 95 percent of particles as small as 0.3 microns when properly fitted. Protects against fire smoke, smoke pollution, household dust, pollen, dust mite allergens, animal dander, molds and other small airborne contaminants. Ultra-lightweight for superior comfort. Features an adjustable nose clip, two elastic straps, and a one-way exhalation valve to prevent moisture buildup. National Occupational Safety and Health (NIOSH) approved. For disposable use only; discard after 5 days of use. Package contains ten (10) masks.