We've been using them for about 2 months and have been happy with them until some of our waterproof inners have started leaking! I'm very cross as they were not cheap, but am a bit hesitant to somplain as they will prob just say I washed them wrongly. Did I? I must confess to washing at 40 oC rather than 30 oC (as our machine doesn't do 30) but would that really make all the difference?