what cover do you put over the bbb?

oh, after reading your post several times, i THINK you mean you wish the BBB were LINED with microfleece, instead of putting a separate microfleece liner in it yourself. Baby Soft Landings sell night time liners (microfleece), cheap, light to post. You could always buy half a metre of microfleece at Spotlight and just cut them to the size yuo're after, it doesn't fray so no sewing is needed.

i love the malden mills fleece pockets for night too.
When you say you stuffed it with a bamboo prefold and a fleece topped microfibre booster - well, did you realise, that the microfleece topped boosters, are ONLY to put inside a fitted nappy, they are not to be used as inserts? The only things you use for inserts are bamboo, hemp, microfibre boosters/prefolds/foldups that have no microfleece on them.
So maybe you meant topped with bamboo fleece or hemp fleece and all is good.
but Just In Case you really did mean, microfleece topped - um - no , i would not be doing that.

If your bub can undo velcro/aplix, i would not be putting him to bed in ONLY his nappy, sounds too dangerous! Would putting a sleep sack, or overalls over the nappy stop him from being able to remove nappy himself? CLever Nixon, but obviously driving mummy mental if you have to clean up poo like that! you poor sausage! I think i will be beside myself when my bilby works that trick out!!!

I have been known to get fave aplix nappies and have a kind person with a snap press, makeover the aplix nappy into a snaps nappy.

Have you seen the Super Bamboosters at nurture nappies? 15 layers of bamboo terry. too bulky to use in the day, but great overnight in a snug fitting cover. very thirsty.

I wouldn't be using up too much space in night pockets with microfibre. If you really want bang for your buck (heaps of absorbency), i would fit as much bamboo in there and forgo the microfibre, cos think of the bamboo as the long distance runner, and the microfibre as teh sprinter. Now who do you want on your team for a Long Nappy Wear?