hi! I am not sure of its name in foreign countries, the outermost is a three-color silk material with red, green and blue (the finished effect can resemble a feather with color change and luster), the other is also ordinary PLA from the inside out are black, blue, gold and silver (feather stem part).I hope it helps

Thanks you for the response, I'm still struggling to find a silk RGB tri-color filament. Cheers and very nice model