After initial breastfeeding problems, because chewed nipples, my midwife had recommended this nipple shield. Since we use it, it works without any problems with breastfeeding. The only stupid, of course, they have to be sterilized from time to time, but I'm happy to take into account, if I may thus continue breastfeeding my child. With practical storage box I have always with you a hat to the move not to miss out on breastfeeding. Great product.