Officially we do not recommend "stacking" pads within a panty because...

• Stuffing more than 1 pad in a pad pocket may result in an unnatural and/or unrealistic-looking boost.
• Forcing too much padding into the panty's pad pockets may rip the seams of the pad-pockets.

However customers do tell us that they stack pads in their Bubbles' Pocket-Panties with success. It's all about trial & error and personal preference (but please keep the 2 bullet points above in mind if experimenting).