We got this idea from the removable top bars on external frame packs, and it adapts very well to our system. This makes the pack excellent for heavy loads, and not too big/tall for UL backpacking, busting brush, and most Eastern hunting uses. It is both a great daypack and a great heavy hauler.
Pricing on the extendable frame will be out soon. We will upgrade folks who have already ordered for free (if they wish) as a "Thank You".
