also they are only used to hold poop, not urine, thats how they get them not to be bulky. So dont put them on too early and expect to stay dry, the pee goes right thru. I knew a lady who changed her daughter at home for swimming lessons and couldnt understand how come every time she got too swimming that her daughter and her carseat was soaked. we told her why and from that day one, she changed her when she got there and hasnt had a problem since.