When DD2 was little I made all her nappies and sewed a PUL outer layer on it to save having a cover and making it waterproof, as i made all mine I dont have much knowledge on different "brands" but i did have a pattern for a night nappy and booster and my DD was a heavy wetter so i used the night nappy plus 2 boosters to keep her dry enough until she woke up - sorry i cant be of much help re buying nappies