Like said, it's just waxed nylon, kind of like dental floss ,only larger dia. Buy some Tan or bronze , dacron, looks and works a whole lot better. Both are man made. By using the artificial, you are robbing the performance of that fine bow you just built. Kinda of like putting Acme tires, from Wiley Coyote, on you Caddy! Nothing wrong with learning on this type material, but if you can step up to the newer materials , do so! Then go for F.F.... Good shootin, Steve