I liked the concept of purchase but I was disappointed with it because there had urinary leakage. The layer seems small for my son who is 9kg. It does not take overnight. Besides, although I change approximately every 3/4 hours once I had left with for 6 hours in the night and it overflowed, too bad, I'll try the superior size to see if it respond more to their needs. In any case the concept is without évivoque free from criticism.