Hot answers tagged fire
Wool does not melt or drip This answer might surprise you: wool! Wool (...) does not melt or drip(.) Wool ignites at a higher temperature than cotton and some synthetic fibers. It has a lower rate of flame spread, a lower rate of heat release, a lower heat of combustion, and does not melt or drip; it forms a char which is insulating and ...
TLDR: military grade tech fabrics designed for air and tank crew uniforms. As others have pointed out you might reconsider cotton as an outer layer only. Be careful with waxed cotton as some have suggested, occasionally the wax is flammable. Wool is a good choice given your criteria. If however money is no object and/or you don't mind surfing ebay till ...
A purely synthetic outer layer of Nomex is a good choice. People fighting wild-land fires generally wear Nomex It it works in the middle of a forest fire, you will probably be happy with it at the campfire.
As already was pointed out in the comments: leave synthetics. Some time ago (can't find the source any more, unfortunately) I read about a guy who planed on a very minimalistic outdoor trip basically for the rest of his life, i.e. basically wander the woods of Europe and staying wherever he likes to stay. In his plans this required mostly to build your camp ...
Leather is awesome for standing up to sparks. Just ask a welder. And some people think it's good for going outdoors too.* *But not me.
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