Great accessory for Orca Bags, with a few minor flaws.
Well made, well ventilated and easy to setup.
Only thing to keep in mind is the back pouch for a "battery pack". It's square, while most portable batteries tend to me rectangular, so some top heavy batteries might slip out. But nothing some tape or rubber bands can't fix. Read more
Also note, that the integrated USB cable is removable and swap-able for other cables if need be...
And I guess there's also a metal rod for back support available, but can't seem to find it anywhere... Would be nice to have as there are slots for it and it should take some of the weight off the shoulders.
Otherwise all good, and nice Orca quality as well.