I use these layers since the birth of my daughter. I never had a problem found. My daughter slept 13 hours per night or even sometimes 14-15h (this is a big sleeper) since she was 1 month. She has now 15 and still sleeping much. In 15 months, I had a single leak after a night of 14h! So I really have no quarrel with these layers. It really absorbed and do not mind traveling for baby (fours or walking). In addition, the price is more attractive than the supermarkets,