"I never knew there were 100L packs!"
Ok how about this one:
Bergans 3800 Power Frame
volume 130 liters, 7,900 cu in!
weight 4,9 kilo's, 10.13 lbs!
I came accros one in germany and had to try it off course. It weighed a total of about 20 kilo's, 44.1 lbs. It was actually very very comfortable. It didn't feel heavier than my ordenary daypack i was carrying. So if I'd be a lumberjack and need to carry my chainsaw etc this would be my pack of choice.
Nice feeling though, that two SUL hikers together have a baseweight of less than what this pack weighs.