3 ms·
Wrong. Surgical masks use exactly the same material as N95 respirators - melt-blown non-woven polypropylene, only much thinner. This material is extremely diff
by hejdirk 7y ago
Wrong. Surgical masks use exactly the same material as N95 respirators - melt-blown non-woven polypropylene, only much thinner.
This material is extremely difficult to produce, which makes it hard to scale on short notice, so its price in China shot up 50 times.