Kinder Covers…what do I put inside?

I accidentally bought 6 Kinder covers, thinking they were pockets (which I already use). I figured I’d give them a try since I have them, I’d like to set them up with absorbency to use overnight since I can’t find an insert setup I like with my pockets for overnight. My girl is 4 months and a heavy wetter, she’ll soak through a 6 layer and 4 layer insert overnight (Kinder’s green & white) so I’ve been changing her once in the middle of the night. I’d like to find something that works for a full night if possible! I know I could snap the inserts I already have in, but I’d like to try something new and possibly better for her.