Medical-Grade N95 Lab tested and clinically proven to prevent the risk of infection, bacteria, dust, chemicals, particles, pollen and smoke. Medical-grade carbon filter(PM2.5) traps and filters air molecules from deadly viruses, flu and bacteria, bacteria, dust, chemicals, particles, pollen and smoke. Blocks 95.99% viruses & bacteria. Adjustable nose clip with foam for comfort. NIOSH approved TC-84A-3888 42 CFR Part 84, N95 class.