I add a day insert and a night time one for Eleanor and i have never had a leakage problem over night that is using a peapod not used my new ones yet for overnight. For Kimberley and Alexander i use the day insert and two night time boosters and i have only had a few leakage problems with them but only when they wee alot overnight. It's only now and again it happens. Also they are in peapods at night.