The very light and small packable bag is used to get over the obstacle in strong currents and back flows.
Either as a drift anchor for a zip line or as a drift anchor to pull yourself out of the pool on it.
The Floatingbag is ideally filled with 1L of water, so it can be flung very far, even over large backwaters > 20m.

It has the following advantages:
You don’t have to use your backpack with all the stuff in it as a floating anchor.
It can be thrown/flung much further than a backpack
In the current it fills up like a parachute and generates a very strong pull force.
It is very light and small and yet extremely robust due to its double bottom and double edge.
It floats very well thanks to the buoyancy bodies and is very visible thanks to the bright color