Puckster wrote on Dec 8^th, 2012 at 4:48pm:

Interesting discussion.  Are the Ostrom packs waterproof, or do they require plastic liners?  I'm curious why no one commented on the waterproof genre of canoe packs, like the North49 Waterproof Canoe Pack 120 L.  I have no experience with these "rubber" packs, but the waterproof nature of them is, on the surface, appealing.  They do look bulky and uncomfortable, but again, I have no firsthand experience.  prouboy

pb, I like the option of being able to pack wet/muddy stuff in my pack, but not inside the liner with the dry stuff. I guess you could always bag the wet stuff inside a waterproof bag too, or start lining the waterproof pack if it fails. I've just always lined my packs since I started that way with a Duluth pack. I do have some waterproof packs for loaners and they work OK for my newbies.