Hmm so did you start using boo's or something else? I kind of asked IB, they said the boo is made of all natural fibers so I guess making them waterproof would introduce synthetics! I find it really bulky tho to have so many boosters in the boo, then another cover on top...
I started with d'lish then moved to genessa forge super super (super? - cant remember if there's 3 supers or not; they have 17 layers) trim night nappies until DH refused to put them on and we swapped to sposies overnight.