Ryatha- I have read that bamboo is 60% more absorbent than cotton and I love the softness of bamboo compared to cotton, which is why I am looking at bamboo ones to get. My DD currently wears one of her (clean) BBH bamboo fitted nappies on her head during the day and takes it into bed with her at night- she loves the feel of it that much!

I have checked the Booroi site and prefolds some in:
34x34cm
40x40cm
37x53cm (which is the one that I must have)
What size would be the best to buy for a n/b if I wanted a dozen? Six of 34 and six of 40? And do they just get folded in half or thirds then placed into the cover? No Snappies? No wrapping around the waist?