Ave
I am unsure. First, they don't form around the nipple at all so they don't touch the skin that is the most likely to be irritated when breastfeeding. I put these on and they felt nice and provided some relief, but they also made me just a tiny bit itchy. I am not a person with allergies or sensitive skin so that seemed weird. I am not sure if I just found the first thing I am sensitive to or what? The itch was very mild and went away immediately after a quick rinse. I just worry that something my skin is sensitive to shouldn't be around when a baby is eating. I would definitely be sure to wash between using this and breastfeeding.