The newest 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 system. Add a Super Spike Duffel's 2900 cubic inches, and you get a 7500 cubic inch load hauler (Spike Duffels sold separately).
The J34 features a streamlined shape, vertically adjustable torso length, waterproof zippers, a high-visibility interior, deep "3D" ventilated padding, scabbard drainage and cleanout access.