Yep. Looking at that video again, our good Samaritan is wearing a nylon windbreaker/jacket. Now what are you going to do if you find someone who needs to be pulled?
Cotton, maybe okay:
Wool is good;
Nomex is not cheap but I have one as a flight jacket and it's on the front seat.
Nylon? Polyester? No way would I go near an open flame while wearing one.
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Better is the Enemy of Good Enough.
Okay, what’s your point??