Some nappies are designed specifically for nights although some people choose to use them in the day too. They tend to offer more absorption. Sometimes parents choose to add an extra booster or pre-fold to their daytime nappies offering more choice and value. Older babies and heavy wetters may need additional absorbency, in this case fitted nappies and covers or wool/PUL pull-ups are fantastic. Pull-up covers are especially good if you find your baby or toddler is getting red marks in the morning where the wrap has been against their skin.