Ooh yes well size 1s arent really newborn so should def still be fitting those. And even with boosting theyre not lasting?
No idea, i guess he must be a very heavy wetter. Scarlett was fine in her Tots Bots size 1s until about 4-5months i think, maybe longer - with boosting added as she needed it.
Not sure what to suggest other than more boosting maybe with something like hemp or zorb?