This is the latest version of the pack that started a gear revolution, the legendary Just One Pack™. As in, “if you’re going to own just one hunting pack, own a Just One.” The Just One is extremely versatile and it comes with the patented features that make Eberlestock packs unique. Starting at an ultra-compact 2300 cubic inches, the built-in Cam Expansion System™ expands it to 4600 cubic inches. Add in a Super Spike Duffel™, and you get a 7500 cubic inch load hauler.