Both fleece and AWJ liners are hydrophobic and great at wicking moisture away, so are perfect for creating a stay dry barrier in natural fibre nappies that don't have their own lining, at the same time as making clean up easy.
Available in regular rectangle style as well as a shaped option for full coverage.
if you are having trouble deciding, my personal preference in regular liners is for microfleece because I find it stays in place better. (AWJ can have a tendency to bunch up and slide around)
The full cover ones are held well in place by their shape, so work equally well and many like the lightness of the AWJ.