Just like an All-in-One except YOU get to choose the absorbency you need.  Pre-stuff them on laundry day and they are ready to go.  This is an overnight favourite.

Pocket diapers require you to stuff an insert into them.  They are a bit bulkier, but have the option of adding more layers for absorbency.  This is a good choice for an overnight diaper.  Simply add a few extra inserts and it will keep your favourite bum dry the whole night.