With over a decade of performance in the field, the original Mainframe grew to be Eberlestock's most trusted modular hunting platform and the foundation of the Hunt EMOD system. Over the years, it has been adopted by a wide range of users, from serious alpine hunters to top-tier professionals in the tactical and long-range competition communities. While maintaining and building on the original concept of the Mainframe, Eberlestock developed the new Mainframe II with several updates to improve how comfortable the pack feels when you start adding weight on your back. Eberlestock kept all of the key features from the original frame, like the durability and the meat shelf, and added Eberlestock's new Cradle Hip Belt, new Contour Shoulder Harness, and elevated load lifters. These three features drastically improve ventilation, weight distribution, and overall comfort. Additional attachment loops on the sides of the frame and 20mm compression straps with auto-locking buckles give you extr...