Okay, I know nothing about car tyre inner tubes; apart from what I just looked up.
Would a self-repairing inner tube work or do they have compartments that would mean the filling of the homemade Bulgarian Bag would not be able to move freely around the inside of the bag/tube in order to fill the thing to start with?
Anyone have ideas on this? Or an old tube of that sort that they can cut up to check out?
36.5 kg /80.3 lb Middle-Finger DL (right hand)...