It's an older internal frame large capacity kelty vortex pack. It's almost new, I think I used it twice a decade ago
It has a removable top that doubles as a fanny pack. It is very nice but heavy. 7.5 pounds. I don't remember the size but it is very large. $40 on Craigslist. $20 on here. Call or text Dan 503 935 0856There's a picture in my craigslist ad.
http://portland.craigslist.org/clc/spo/5171449332.html