If you need different pack sizes for different adventures, then you’re in luck because the Drover II Hauler-Frame is detachable and compatible with both the 40L and 80L Hauler Packs. The Hauler-Frame is packed with features that make carrying both your gear PLUS your prized game a breeze. Features include adjustable meat shelf, adaptive lumbar support, adjustable straps and easy access hip pouches give you plenty of options to meet your needs. The fully adjustable design means you can strap in just about any sized load and adjust it for maximum comfort for the long walk back to camp or your vehicle.