I use raw silk from our local materials place. Its pretty heavy duty and good quality.
But I have seen bows that were backed with old ties and all sorts.
Silk doesn't stretch or store energy as far as I have experience and I have used silk quite a bit. Just protective and best, at worst just looks nice
![laugh :laugh:](http://www.primitivearcher.com/smf/Smileys/default/laugh.gif)