If you were to use an itti nappy, when it is wet you would change the entire nappy. But instead of chucking the whole nappy in for a wash, you unsnap the inserts, let the shell air while the second nappy is on, then snap new inserts in & go again.
As long as the shells are aired between, this shouldn't be a problem.
This is rather like what I do for the covers of the BBH bamboo fitteds...

I do have 2 petites, but they just don't seem to have enough booty in them for me. I've only really used them twice.
"enough booty" = too narrow?

Might have to try a few of each. BBH have a sale on atm...