Zpacks Arc Backpack BeltZpacks Arc Backpack Belt The Zpacks Arc Backpack Belt is a removable and interchangeable hipbelt designed for Zpacks Arc Haul series backpacks. It allows you to easily customize the fit of your pack over time whether your body size changes, you share the backpack with someone else, or simply need to replace a worn belt without buying an entirely new pack. Built for long distance comfort, the belt features supportive 3 8" foam padding and dual adjust