They give you the option on the checkout to have the fabric shipped folded, or rolled for even more $.
I ordered a couple yards of the green, but before seeing the shipping cost, which unlike most sites did not appear until late in the checkout, and used a service that puts a cap on the charge to the credit card. Used a cap that was twice the amount of the order, and way more than it would cost to pop the material into a USPS priority box or padded envelope, and LOL, they even exceeded that by quite a bit.
The charge has not appeared on my account, so it was probably blocked. But no word from Seattle Fabrics, not even a rude one. If they actually ship me this material, will post more about it.
I put this up because Quest ran out of their double coated 200D 4 oz oxford some time ago, has only black now, and Seattle Fabrics has several colors. Can't find any anywhere else.
So I will apologize for raising any false hopes. Suppose if someone really wanted a more waterproof nylon material for a pack at 4 oz/sq/yd at what amounts to around $18 a running yard, it might be worth it to them.
On a more positive note, I've recently run across a source of balloon cloth that is the same spec as "Hyperlast" from Dow. It is about 2.75 oz/sq/yd including the silcoat on both sides (2.3 oz base weight), Dupont 6,6 nylon, and while I don't know the HH, it proved very waterproof using my primitive squeeze tests and will be used for a pack ASAP. Am waiting for the OK from the seller to post contact info on this forum, and will do so as soon as an OK is received. Things are lookin' up!