Abstract: Packs that have a body-conforming frame assembly. In some embodiments, the frame assembly is adapted to conform in multiple dimensions to the shape of a user's back or other body portion. In some embodiments, the frame assembly's shape is at least substantially defined by the shape of the flexible pack to which the frame assembly is secured. In some embodiments, the pack includes a retainer assembly that secures the frame assembly to the pack, with the retainer assembly optionally defining a compartment that is smaller in at least one dimension than the frame assembly. The frame assembly may be an internal or an external frame assembly and may include ventilation structure. In some embodiments, the pack includes a hydration system, with the pack including a compartment that receives a fluid reservoir, from which a drinking tube extends external the pack to a mouthpiece.

Abstract: Packs that have a body-conforming frame assembly. In some embodiments, the frame assembly is adapted to conform in multiple dimensions to the shape of a user's back or other body portion. In some embodiments, the frame assembly's shape is at least substantially defined by the shape of the flexible pack to which the frame assembly is secured. In some embodiments, the pack includes a retainer assembly that secures the frame assembly to the pack, with the retainer assembly optionally defining a compartment that is smaller in at least one dimension than the frame assembly. The frame assembly may be an internal or an external frame assembly and may include ventilation structure. In some embodiments, the pack includes a hydration system, with the pack including a compartment that receives a fluid reservoir, from which a drinking tube extends external the pack to a mouthpiece.