First I let these set days. They did not come sealed.1. When I blow air out as hard as I can with my hand in front of the mask my breath can not be felt by my hand but instead I feel it on my neck. So it actually working to keep my droplets in.2. They are actually a tiny bit big. I think what makes it big on the sides for me is the big ear straps.3. ear straps are comfortable. but maybe too big which is way better then too small.4. They do seem thin. So I was surprised they really work during my blow air out test. And also suprised when I cut one then got tweezer to see exactly how many layers of different material. I counted 3 layers. 2 whites and 1 blue. The middle white layer is thickest. kinda thin like tissue paper but VERY different. Harder to rip then tissue paper.5. They actually have one of those nose metal pieces. It is a thin metal wire. I thought that was cool and made it fit better. If you don't feel it you have it on upside down6. Matched the description 100%! All the pics look exactly what I got.7. They are made in wuhan BUT very happy to have received. And I can't find any made in America right now. Other then cloths which I also got. But I think these are better then the cloth ones I got. & I am not a prejudice person. Got one for myself and my mom. But hers I had shipped to her.8. I am NOT a scientist or a doctor. I just can right a review now that a fully examined the product. Literally dissected it with scissors and tweezers.PS do Not order these and put them on right away best to let anything sit for a while. We all know factories like amazons distribution centers etc have covid right now. I washed out side of box then let sit
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