The latest model of the Just One family shares the essential features of all of the others in the line. It's extremely versatile. Starting at an ultra-compact 2300 cubic inches, it expands to 4600 with its built-in Cam Expansion(TM) system. Add a Super Spike Duffel's 2900 cubic inches, and you get a 7500 cubic inch load hauler. The J34 features a new streamlined shape, vertically adjustable torso length, waterproof zippers, a high-visibility interior (no more groping for a black flashlight in a black compartment), deep "3D" ventilated padding, scabbard drainage and cleanout access. The J34 is still the same terrific all-around pack; it's suspension is designed to move with your body, making it comfortable to wear as a daypack, and the pack is supremely capable and comfortable under a heavy load. Try one, and see why there's a growing movement afoot in the hunting community that's saying that the Just One is the best hunting pack ever built. With the Quickdraw Backscabbard(TM), you can reach over your shoulder and quickdraw your firearm, arrows from a quiver, etc. As with all Eberlestock packs, the Just One is hydration system compatible. Another key feature that's difficult to describe but is extremely important in a hunting pack is that it's quiet.