[maxerickson]

Yeah, I checked prices for ripstop nylon when I posted. Cordura doesn't seem to be a whole lot more expensive than I said.

http://www.rockywoods.com/Fabrics-Kits/1000D-Cordura-Nylon

[dgacmu]

It's also heavy. A better choice for this person's application would be Tyvek. (e.g., https://backpackinglight.com/forums/topic/18758/ ).

[chrisseaton]

Maybe the licenses for the patterns I was buying it with pushed my prices up.