  Billingham Back Pack Harness Designed for use on the following models, 106, 206, 306, 225, 335, 445, Packington, and attaches to the five loops of these models. Carry your gear on your back!
The BPH provides the ability to turn a shoulder bag into a back pack. Please remember that any accessory such as this cannot be expected to perform in quite the same way as a "purpose-designed" backpack.
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