are these bindings for all mountain riding...
are these bindings for all mountain riding or just for parks and would they fit on a flow board or does it have to be burton?
These bindings will fit on any board!!! (yes, they will fit your Flow) any 3 hole, 4 hole, or a channel system and you will be good!
As for "are they for all mountain or just parks" ...that is a personal preference. These bindings are a full polycarbonate tray that are built to be soft flexing. Personally, the softer the better for me. It just all depends on what your into.
They will work just fine and dandy for all-mountain comfort and performance!