My 19 month old is a pretty heavy overnight wetter. We got some big premium size microfiber auto towels from sam's club and stuff 3 of those in his overnight diapers (BG 3.0 diapers, so kind of standard one-size pockets). Just recently, it's been working less well and even though he's only 25lbs, it seemed like it was a stretch to get the poofy diapers on him, so we got some Large FuzziBunz pockets that we fill with the same stuffing. Since it's a bigger diaper, it holds all the stuffing better. We can actually fit more stuffing in there, and if he starts outwetting this, I can add some more.