I don’t fly, but I hadn’t thought about fabrics other than insulation or how well they wear. I’m going to have to go back and check. Mostly I wear dockers or cargo pants and polo shirts. I do wear good boots and replace the laces with 550 cord. I carry at least two knives, one a Leatherman, Surefire, bandanas, string and wire in my pocket. Plus my PSK and a space blanket wrapped in a trash bag with more cordage in my belt. Vehicle has extra clothes plus seasonal BOB.