It's also heavy. A better choice for this person's application would be Tyvek. (e.g., https://backpackinglight.com/forums/topic/18758/ ).
Re:Ultralight IKEA-Bag Backpack
by chrisseaton on Tuesday November 22, 2016 @09:17AM
(#13014242)
Maybe the licenses for the patterns I was buying it with pushed my prices up.
http://www.rockywoods.com/Fabrics-Kits/1000D-Cordura-Nylon