Had trouble locating a bag that would hold 2 tubes but not be enormous. I bought the medium size of this bag.
This looks good, fits well, holds what I want it to, and seems like it will last.
Could be a bit more secure as the Velcro isn't lined up well enough to really crank down on it but it wont fall off.
Fit 2 road tubes, 2 tire levers, multi-tool, pressure gauge, backup battery for headlight, and some meds.