3M 8511 Respirator, N95, Cool Flow Valve (10 ...- 3m Einweg-Hepa-Maske n95 ,NIOSH-Approved N95 for at least 95% filtration efficiency against certain non-oil-based particles 3M Cool Flow Valve helps reduce heat build-up inside the respirator Breathe 30% easier* compared to 3M 8200, breathe easier is defined as initial pressure drop Advanced filter media for easier 3m n95 masks3M 8511 Respirator, N95, Cool Flow Valve (10-Pack) 4.7 out of 5 stars 556. Prioritized for organizations on the front lines responding to COVID-19. NIOSH Certified Makrite 9500-N95 Pre-Formed Cone Particulate Respirator Mask, M/L Size (Pack of 20 Masks) 3.7 out of 5 stars 58.

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