polyester better than nylon for LT storage?

[BarcodeOnTheBack-migration]

http://www.ihobb.com/cgi-bin/ws400CS.cgi?category=CURRENCY+HOLDERS&pcat=currencysupplies.html

 

I can get these for 79c a sheet shipped, and they are made out of "inert polyester" instead of the nylon I see most of them made of. (scroll to bottom of page, look for supersafe 4 pocket banknote pages)

 

Is this a good deal? Is polyester better than nylon for long term storage of currency? Thanks!

[Conder101]

I don't think I have ever seen pages made of nylon. Vinyl, mylar, polyethylene, even polypropylene but never nylon.