Board shorts material

[be-glomped.livejournal.com]

What kind of material are board shorts made of? My sister has a pair but there's no tag with the material info on it. I've looked on Google and I've checked a few surf websites and surf store sites, but I can't find anything. We're going to the fabric store today and I would really love to get the right material. Could someone check their shorts and tell me? Please?

God I sound desperate.

Thanks (I promise to post pics once I've got my shorts made!)
Alex