Def look out for night nappies, we use Wild Child, Puddlekins although the one I use with great sucess is a boosted day nappy, also use a toddler bedbug and have 2 gorgeous Dreamscapes but they def wouldn't work for a heavy wetter. Itti's def won't cut it at night.
If you get in touch with Emma at puddlekins she will make you a custom night nappy especially designed for you lo's needs, it will be a bit more expensive than some but you lo will have a nice dry sleep which is worth the price imo
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