BabyLove nappies are designed for day and night time use and have a set of specifications, which are strictly followed by our Quality Team. Every child is different in shape and size, so, occasionally leakage problems may occur. Other factors, such as how often the child has a bladder or bowel movement may also affect the absorbency of the nappy. The weight range on the pack is a guide only to help mums and dads determine the best size nappy for their child. Leakage issues can often be resolved by moving to the next size up.