This is a Kelty Bigfoot 5200 pack.
Internal from Kelty's Mystery Ranch System
Its for a regular torso 16-22"
5200 cu in
It has a compartment for a water bladder. I think 100oz but I am not certain.
I picked up this bag 4 or 5 years ago and have never used it. I had plans but things in life change. It has been in my closet and I still have the tags for it. Original cost was $250. Looking to get $125. Let me know