Randomy Trashy reviews the Haley Strategic D3 Flatpack in Multicam. This is an expandable flatpack system that when empty lies really flatpack for easy storage. But when fully expanded, it can be up to 600 cubic inches of an assault pack. It can be integrated with the HSP D3CR and D3CR-H chest rigs and can also be used with MOLLE equipped plate carriers, vests, and other backpacks.