Dd is 16 weeks old and sleeps up to 9 hours a night . Unfortunately, her nappies don't stay the course and leak - the leak problem has started since she moved up to size 3 disposables. I'm getting fed up with changing her bedding every morning, so can anyone suggest a nappy, disposable or reusable, that will fit a long slim 13.5lb baby who hates anything massively bulky round her bottom, and keep everything dry til morning? At the moment we're using disposables at night and bambino mio reusables during the day.