The AH-3HD is specifically designed to handle heavy loads, but can also be used without the padded waist strap when using medium or small sized audio setups. The large padded belt fastens tightly and comfortably around the users waist, and attaches to any bag's D-ring system using carabiners. By adjusting the chest and underarm straps, the user can easily lower and transfer the bags weight down to the hips, alleviating strain from the back and shoulders. The spinal strap can then be tightened to complete the setup. The low profile of the harness's padded foam material molds to your body and distributes the weight evenly, while keeping the bag securely in place.