Well, I decided that the wool cover needed a little wash to soften it up. Since she had been wearing the fitted +1 liner for an hour w/ no wetness appearing yet, I decided to be daring and allow her to nap w/ just the fitted outer shell +1 liner (6 layers), no cover. She wore it for an hour during tummy/back playtime, then an hour napping on her back. She woke up SO happy! And might I add... DRY. There was a very subtle dampness to the center front area when I changed her right after, but it wasn't even visibly wet. It was just slightly cool to the touch. None of her clothes or bedding were wet, unless you count the slobber from the other end. I went to remove the liner from the pocket and the back top was dry, so I know there would be a lot more absorbency left had I not changed her. This makes me convinced that I can let her wear this diap sans wool cover with confidence around the house. So far, this diaper is really impressing me and making me want to buy more, despite the high price tag.
[Disclaimer: I was not given any free diapers to write this review.]