S.H.
I LOVE Potty Scotty's!!!!!!!!!!!!!!!!
I got mine from E-bay. A 12 pack.
LOVE it.
My son is 4, about 50 pounds and he wears the size "xxlg."
I still use these on him even if he is potty trained, because it still fits him and he loves it. And, it wicks up any 'leaks' that he may have.
Potty Scotty's also has the waterproof versions too.
Just look online, at Amazon you can read the reviews of it.
Oh yes, also get waterproof bed pads.
But, keep in mind, that night time/nap time dryness, is not something BIOLOGICALLY attained, until even 7 years old.
And this is normal. It is different than daytime toileting. It is about the body's physiological development/brain connections/and nerve development.
My son is 4, wears a diaper for naps and sleep. It is fine. He does NOT get confused. I just tell him that his body is not ready for being dry at night.
And I ALWAYS put a waterproof bed pad, under him at sleep.
Its fine.