Runningwater
WKR
I won't be ever going back to cordura as my main backcountry pack. I've had great luck with my Xpac and am sure will someday be trying out whatever the latest and greatest fabric is when my current pack gets tired. That said, my primary backcountry trip every year is on the Kenia - so as close to true waterproof as I can get is important to me. I had the experience of a completely wetted out cordura once and it wasn't fun (oddly not in AK but mountain goat hunting in CO). I've yet to put a hole in my Xpac from alder, devil's club etc. up there - but I've heard stories about the thorns in TX and AZ and do not doubt it can be done. Xpac isn't too loud to me above freezing but can get very loud in the teens and 20's. The answer is of course you need several packs! Good luck with whatever you choose!