First, I noticed in these pants that are extremely tight on the legs. Not only so tight that nothing can leak, but so much that she cut a very short time. Waterproof, they are not. at the moment when my son told me. "Mama, there Pipi", the couch was already wet. Although they are a little thicker, use a normal underpants by a thick terry cloth liner that does, however, not much. Quite the contrary. My son looks more like these pants as diapers. In the end, one is served just as well with a normal panties, because brushing you have either way. There is only one star for the design, which has my son really liked.