I've been so used to using pockets but recently have bought loads of fitted and put them straight on Evie. It occured to me later that I maybe should have lined them. Do have some liners but is it neccessary to always use a liner?
A liner serves 2 purposes, to act as a stay dry barrier between baby's bum and wet nappy (especially if you use fleece) and to make poo removal and disposal easier. It isn't totally necessary to use them but people do for these reasons. HTH