I've seen comments from others who've had chronic leaking with the Softbums, usually out the legs. Maybe the fleece wicks or something.
Anyway, we have epidemics of leg-leaking every so often but it usually indicates a problem with the inserts, not the cover.
Eg we had lots of leaks in the very beginning, then they suddenly cleared up after about a month with no change in our cover sizing; seemed like the inserts needed about 10 washes to reach absorbency and then we stopped having leaks.
It started to happen again a little while ago but a vinegar rinse took care of it; guess we were getting repelling.
Generally when the inserts are performing optimally we don't get leaks. HTH
Me, DH, DD1 (2009), DD2 (2011), and DS (2015).
I'm not crunchy. I'm evidence-based.
Vaccines save lives.