The only thing I can visualize for myself is the basic smaller backpack with the addition of a separate belt that can hold stuff on its own. Mind you, I have never seen the belt, I would probably have to invent it and that hasn't happened.
Sue
Check out the military Mollie belt or stripped Mollie vest.
The belt is just a thick padded belt with empty mollie attach points. The vest is the same except it has two front panels with empty attach points and straps that go down your back to the rear of the belt.
Link to mollie vest. The above link is to a used vest. I got a new one for the same price
I have both the belt and the vest. There is an almost unending number of pocket, holsters, water carriers, small to gigantic packs etc. available for this system. I have been using mollie stuff for years. It is very reliable, easy to use, versatile and available. Prices run from low for used military to absurd for custom made.
The mollie attachment system is very good. Easy (although not always quick) to re-arrange. We change according to the days task, the environment and the weather.
Nomad.