Abstract: An ergonomically enhanced backpack comprises a frame having a semi-rigid dorsal plate contoured to the shape of the lumbar region. The dorsal plate is secured to the body by a combination of shoulder straps and waist belt. An expandable cargo compartment is behind the dorsal mounted plate and sandwiched between the dorsal plate and a panel or netting. Drawstrings combined with the belt allow the user to pull the panel or netting toward the dorsal plate, and thus compress the load against the lumbar area closer to the body's center of gravity. In the first embodiment, that panel has a hinged door giving access to the cargo compartment. A detachable, soft shell bag is mounted over the cargo compartment.