I was given some plain, square cloth inserts by a friend, which I keep at my mum's for when we stay with her (fairly frequently). The wraps (can't remember which) leaked. I used some Motherease wraps instead (used), which I'd been givan by another friend, and they seemed to work for a while, but now also leak. DD went through about six outfits in two days, not fun esp. in the middle of the night....
I'm guessing that wraps perish and become less effective over time. I will buy some new ones, but don't know which would be best for these plain inserts? They don't appear to be branded.
At home I use Motherease nappies and (new) airflow wraps, and we very rarely leak, thank goodness!