I have been trying out various fitteds and we have a range of various kinds, some are cotton/bamboo terry or microfibre terry (Diddy, Fab Fitteds, Stretchies, WNNN) , some are OBV/CV with cotton or hemp fleece layers (i.e. Bitti Boos, Swaddlebees One Size OC, Monkeysnuggles night) and also prefolds (organic flips, thirsties, econobum). The terry style ones are lovely and squishy while the OBV/CV ones are quite firm. The prefolds seem inbetween as they can get lumpy depending on how they are folded. I wonder if the velour/fleece ones are uncomfortable given that they are not as squishy on the bum? My LO doesn't seem to care what we cover his bum with, so it is just me wondering, really. I prefer the squishy ones but they don't last near as long as the velour/fleece ones.