On our second child, I wanted to breastfeed again, but this time was directly on a nipple shield, since I always had pain during breastfeeding. I had in the hospital get nipple shield another brand and still had pain upon each application. Because I had lost the hat, I have to get me new and came across by chance on this. And I was blown away. Even during the first use no more pain. They fit very well and I could my child finally quiet relaxed. The cutout for the nose is large enough so that our child can get enough air and I do not need pay attention to whether the cap sticks to the nostril. The length is perfect and my child can be very good to drink. Overall, you do not feel the hat during breastfeeding. The cleaning of the hat is easy. And you can put in the sterilizer or in the dishwasher. The corresponding storage box is very useful. If you travel in particular.