Speak for yourself More like, most of us have thought about the risk of getting too close to a fire and going up like a torch while wearing various polyesters and nylons, but have then deemed that the risk is fairly minimal, compared to the risks of minor cuts and burns unrelated to clothing, or setting our tents on fire while trying to cook while huddling somewhere out of the wind and rain .
I agree though that its an interestingly worded question. The usual question, and that which people are answering, is for a coat that won't melt from sparks or momentary contact with a hot coal. JayOram has however asked about a coat that he can use "...in and around fire..." . Why on earth do you need to be IN the fire?!? Not really within the scope of this site, if we think you are asking the usual question and recommend waxed cotton or similar, and you end up as the human torch when you try wearing it in a fire... not sure what our liability would be!
Don't be silly. If he's IN the fire....he wont need a coat at all lol
slightly more seriously, as for setting yourself on fire. I grew up in the time of the shell suit! Those things were bloody death traps. I'm sure the friction from running could set the cheap sunday market knock offs a flame