A lot of us prefer older zippers, I have a big supply and you can still buy them new too (or at least you can in Australia). It looks like a metallic lame' chiffon, probably polyester and dry clean only - if it's dusty, you can hang outside on an overcast but breezy day, that should shake most of the dust out. Mind you, I automatically clean everything because you just don't know what lives in older fabrics that may have been stored badly.