In order to most accurately recreate the sounds of the golden age of rock, Exceltylene Vintage Cables are pieced together from reclaimed copper and decades-old nylon braids found at scrap yards and copper dross from the U.S. Mint foundry. At least, that's what my speculative, manufacturer-fiction (ManFi) piece about the cables claims. The actual cables are just good instrument cables covered in braided nylon.