It would be more fun the make a tyvek kite.
And more creative.(Though I must admit that making my wallet thinner would be a wonderful thing, I also have to admit that it isn't the wallet that's the problem -- it's all the stuff I insist on carrying.)
Look in the upper right corner of this page. See the box labelled "Google Custom Search"? Click on it, and type "tyvek wallet", then click the "Go" button next to it.Or look at the Related items which become visible below it if you scroll down.