Since I changed my gender on Facebook, I do get a lot of adds popping up. I thought I remember one brand able to be a backup for a pad too, but looking for it, I could not find anything. Thinx is the most common advertisement and they claim to be a backup for cups or tampons or being used all alone. Given the fabric structure, I do not believe a pad would work with them.
A few other brands you could look into, I marked the ones where I found explicit mention of pad usage...
- Dear Kate (also supposed to support "backup" for pads)
- Modibodi
- Pantiprop
- Anigan
- Vv SkiVvys
- Pantipads (supposed to be for backup at night or while traveling)
- Period Panteez (These actually claim to be usable with pads and tampons)
- Knixwear. (Same here "can be worn as backup to a pad)
Hope this helps,
Hugs,
Sarah