Originally Posted by hammock engineer
One more thing on the sea to summit bags, they are siliconized cordura and not sil. But sil works pretty good. I am thinking they made them out of cordura because of the spray you get from sil under heavy pressure. Not a good thing in a dry bag.
Probably has something to do with durability, too - those bags were originally designed for water trips, where they'd be under pretty constant abrasion from dirt, rocks, whatever...