Face Mask: 5 Face Masks Observed (simple test) Homemade, Surgical, KN95, N95 more

3 years ago
3

In this video I observe 5 types of commonly used face masks to protect against Coronavirus (covid19). I use LED back-lighting to test thickness. I try each mask on. I include information about the effectiveness of wearing face coverings and explain why the KN95 is my personal choice (short of a charcoal gas mask).

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