I thought I would pass on some info if anyone was in the market for a new pack. I borrowed a pack for a 6 day back country hunt I did last year. Weight we packed in was about 55-65lbs 5-6 miles deep. Pack I used was the Sky Guide 7900 with the Krux frame. All I can say from personal experience is that it is the most comfortable pack I have ever used. Obviously whatever they do with the frame, belt and shoulder straps is where the magic is. I am no expert on that but it was so nice I bought one this year. In bivy mode it shrinks down to 4500cu. Anyway, thought I would pass it along for anyone thinking about buying a new pack I would highly recommend giving Stone Glacier a look.