I used to only use bamboo and hemp. But I love fitteds and wool - but everything other than the micros goes so hard and crunchy! Didn't like it at all after a while. AND I like fitteds that fit both the girls really well, to save me taking seperate sets when we go out. The lollipop micros fit both of them really well, dry super quick, no inserts/boosters etc that go missing (I can never find the right booster for the right nappy otherwise

) and under wool - they never leak. Can easily get 4 hours out of them and then I only change them because I don't want them to sit in the same nappy - there is usually absorbancy left. TBH I wouldn't be suprised if they lasted overnight under wool.
Although they are rubbish under PUL

But we never use PUL anymore anyway!