Gossamer Gear Gorilla back pack
weight: 23.2 oz.
max load: 35 pounds
NALGENE Encapsul Hydration Resevoir
Capacity: 2 Liters
One of my favorite features of this backpack (other than being ultralight:)) is that both the hip belt and shoulder straps are hollow. You can store socks inside them which gives them cusion and you a place for your socks. Efficiency!!!:) (sorry for the blurry photo rushing now)