Each saddle bag has it's own dedicated dry bag - you wouldn't be able to use them interchangeably. If you wanted to carry less, the 14L bag can roll down more, but you can't use a different dry bag I'm afraid. This is due to the dry bags being made to fit into each holster as an exact fit.

K1100T wrote: ↑Sun Jan 05, 2020 12:39 am I asked Restrap about buying one harness and two dry bags, and was told:

Each saddle bag has it's own dedicated dry bag - you wouldn't be able to use them interchangeably. If you wanted to carry less, the 14L bag can roll down more, but you can't use a different dry bag I'm afraid. This is due to the dry bags being made to fit into each holster as an exact fit.

So you may need one or other of the harnesses depending on the dry bag you attempt to wedge into it.