acrylonitrile alpaca fiber angora wool animal fiber aramid asbestos bamboo fibre basalt fiber camel hair carbon fiber cashmere wool catgut chiengora coir cotton eczema fiber fiber crop flax glass wool hemp jute kenaf kevlar methyl acrylate microfiber mineral wool mohair moth natural fiber nomex nylon olefin fiber pashmina polyacrylonitrile polyester polyethylene ramie rayon silk sisal sodium thiocyanate spandex spider silk synthetic fiber technora tenax twaron ultra high molecular weight polyethylene vinalon vinyl acetate wool zylon