Wing looks like white polypropylene, like strands from a braided white rope. Could also be nylon monofilament, but don't see too much white mono around. There is a strand or two in there that aren't white though. One is brown, like Maxima, and another is fairly clear.

The rest we know: Golden pheasant, peacock herl, red floss, brown hackle, black thread, and the hook.