EXTERNAL + INTERNAL
The backpack your grandparents (or parents) owned probably had an external frame with a canvas pack attached. Most modern backpacks have internal frames. Both configurations have their advantages and disadvantages, like most things in life. The new Vargo ExoTi 50 Backpack takes a pragmatic approach to pack design and incorporates a titanium alloy external frame with an internal lumbar support plate to give the pack rigidity and transfer the load carrying to your hips. Other features include a removable floating lid, ventilated and adjustable shoulder harness, X-shaped load lifting compression strap system, and various utility pockets.