I recall seeing a safety video of people perishing in a burning building and they said the polyester shirts melted into the skin during fires and in that case cotton would have been the better in a fire.
Very true. When I was in college every time we were into the chemistry labs we needed to be wearing our 100% cotton vests. Polyester was forbidden as it's a huge safety issue in case of a fire
These shirts I got aren't polyester though, so they are safer
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