Interesting question Astrid because I've read some people say that they ruined their underwear not realising about the leakage. That said, I haven't had much actual leak out onto my liner just yet. I insert right as I'm going to bed & generally I sleeep around 4 hours before my first toilet wake up LOL. When I wipe there is heaps of oil there, but it just hasn't made it's way all the way to the liner, so you might be ok. Does that make sense at all?!