Most standard strap-based saddle bags will fit the dual-position seatpost without issue.
You may need to loosen the straps slightly to accommodate the movement that occurs between road and aero positions. If your saddle bag uses rigid clips, clamps, or some other inflexible attachment method, it's possible that your bag may not be compatible.
Here is an example bikepacking saddle bag from one of our ambassadors that works just fine with the Dual-Position Seatpost:
If you have questions about your specific bag, please email us at email@example.com and we'll help you figure it out!