I got asked this at work earlier today. I have no idea how we got on the subject. Has any one incorporated plain woven silk fabric into their laminations (ie the exterior of a stripper)? On the surface silk should work: Silk IS one of the strongest natural fibers around and is very tough. It was used for early bulletproof vests and for parachutes. Laminating into a composite? No idea... I'm sure the surfboarders have tried it!

I did some quick pursuing of the internet and it seems to top out at around 4.5 oz/sy. Cost: about $12/yard for 40" wide.
http://www.plumridge.com/ProductDetail.jsp?LISTID=80000CB0-1196468281

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