A backpack and frame are disclosed, as are methods of making the frame using composite materials and compression molding. The backpack frame is designed to be at least partially internal and is of unitary construction using a resin-impregnated material, such as resin-impregnated carbon fiber sheets with selective reinforcement by interstitial layers. The frame has a mid-back portion that includes openings for independently positionable shoulder straps and a lower back portion that provides for a rotatable connection to a belt assembly. A pair of curved stay portions is contiguous with the mid-back portion of the frame and curves outwardly as the stay portions extend downwardly. The frame is preferably curved to match the curvature of the human back.